Physics Lab First Semester Final – Part I

Please mark the appropriate letter or letters on the scantron

1.         How many kilometers is 4645 centimeters?

(a)  0.4645                    (b)  46.45                      (c)  4.645                      (d)  0.04645

2.         The Systeme International (SI) base unit for time is

(a)  1 day                      (b)  1 hour                     (c)  1 minute                 (d)  1 second

3.         How many significant figures are there in the measurement 0.00280

(a)  2                            (b)  3                            (c)  5                            (d)  6

4.         How many significant figures are there in the measurement 580300

(a)  2                            (b)  3                            (c)  4                            (d)  6

5.         The area of physics which deals with motion and its causes is called

(a)  Mechanics   (b)  Thermodynamics     (c)  Optics         (d)  Relativity    (e)  Wave phenomena

6.         A runner traveled forward 15 km and then backtracked 11 km before stopping.  The displacement from the original position is

(a)  +26.0 km                (b)  -4.0 km                  (c)  +4.0                        (d)  -26.0 km

7.         Which of the following is the expression for average velocity?

(a)  vavg = Dx/Dt            (b)  vavg = Dt/Dx            (c)  vavg = (Dx) (Dt)        (d)  vavg = xixf/ ti - tf

8.         A cheetah can maintain its maximum speed of 27.8 m/s for only 30.0 s.  What is the minimum distance a gazelle running at 22.2 m/s must be ahead of the cheetah to have a chance of escaping?

(a)  100.0 m                  (b)  168 m                     (c)  70.0 m                    (d)  83.0 m

9.         Acceleration is

(a)  displacement           (b)  the rate of change of displacement

(c)  velocity                   (d)  the rate of change of velocity

10.       If a baseball has a negative velocity and a negative acceleration, the velocity

(a)  increases                (b)  decreases           (c)  slows to rest             (d)  speeds up from rest

11.       Which of the following units are used to measure  free fall?

(a)  m/s                        (b)  m/s2                       (c)  m•s                        (d)  m2/s2

12.       If an object is thrown upward its initial velocity is ____ and its acceleration is _____.

(a)  positive, positive    (b)  positive, negative  (c)  negative, positive  (d)  negative, negative

13.       A baseball is dropped from the top of the Washington monument.  It hits the ground after falling for 6.00 s.  What was the height from which it was dropped?  (ignoring air resistance)

(a)        150.0 m                        (b)        177 m               (c)        115 m               (d)        210.0 m

14.       Which  position-time graph shows an object with a constant positive acceleration?

(a)                                        (b)                                            (c)                                    (d)

15.       Which  velocity-time graph shows an object with a constant negative velocity?

(a)                                        (b)                                            (c)                                    (d)

16.       Which of the following is a physical quantity that has a magnitude but no direction?

(a)  vector                     (b)  scalar                     (c)  resultant                 (d)  frame of reference

17.       A plane is flying east at 200 m/s and there is a 64 m/s northern wind.  The total velocity of the plane in a north-east direction is

(a)  210 m/s                  (b)  264 m/s                  (c)  136 m/s                  (d)  200 m/s

18.       A cannonball is launched at a 50 degrees.  As the cannonball travels through the air the vertical component of the cannonball’s velocity (ignore air resistance)

(a)  increases                (b)  decreases               (c)  remains constant     (d)  not enough info

19.       A cannonball is launched at a 50 degrees.  As the cannonball travels through the air the horizontal  component of the cannonball’s velocity (ignore air resistance)

(a)  increases                (b)  decreases               (c)  remains constant     (d)  not enough info

20.       A soccer ball is kicked at an angle of 37 degrees with a velocity of 8.80 m/s.  What is the horizontal component of the ball’s velocity?

(a)  7.03 m/s                (b)  5.30 m/s                (c)  11.0 m/s                 (d) 14.6 m/s

21.       Which of the following is an example of projectile motion?

(a)  An airplane taking off                      (b)  A hawk diving to catch a mouse

(c)  A parachutist drifting to earth          (d)  A frog jumping from one rock to another

22.       What is the path of a projectile?

(a)  a wavy line      (b)  a parabola     (c)  a hyperbola       (d)  No predictable path

23.       Which of these is the cause of an acceleration /the change in an object’s motion?

(a)  friction                   (b)  inertia                    (c)  force                       (d)  velocity

24.       Which of the following is the tendency of an object to maintain its state of motion?

(a)  accleration              (b)  inertia                    (c)  force                       (d)  torque

25.       If a non-zero Net force is acting on an object, then the object is most likely

(a)  accelerating            (b)  at rest        (c)  moving with constant velocity          (d)  losing mass

26.       A wagon with a mass of 12 kg moves from rest to a speed of 8 m/s in 4 seconds.  What is the net force that was applied?

(a)  12 N           (b)  96 N           (c)  24 N            (d)  48 N

27.       Which statement about the acceleration of an object is correct?

(a)        The acceleration of an object is directly proportional to the net external force acting on an object and inversely proportional to the mass of the object.

(b)        The acceleration of an object is inversely proportional to the net external force acting on an object and inversely proportional to the mass of the object.

(c)        The acceleration of an object is inversely proportional to the net external force acting on an object and directly proportional to the mass of the object.

(d)        The acceleration of an object is directly proportional to the net external force acting on an object and directly proportional to the mass of the object.

28.       An object at rest remains at rest and an object with constant velocity remains in that state unless acted upon by an outside force.  This is Newton’s ______ law.

(a)  First                       (b)  Second                    (c)  Third                      (d)  Fourth (?)

29.       A hockey stick hits a puck.  Which of these describes the action-reaction pair?

(a)  The stick exerts a force on the puck, the puck exerts a force on the stick

(b)  The stick exerts a force on the puck, the puck exerts a force on the ice

(c)  The puck exerts a force on the stick, the stick exerts a force on the ice

(d)  The stick exerts a force on the ice, the ice exerts a force on the puck

30.       The magnitude of the force of gravity acting on an object is called the

(a)  frictional force        (b)  weight                    (c)  normal force            (d)  mass

31.       If you push against a wall, the wall pushes back against you with ______ force.

(a)  no                          (b)  less                                    (c)  equal                      (d)  more

32.       If the normal force on an object increases, the frictional force required to slide that object along the surface will

(a)  decrease                 (b)  remain the same     (c)  increase      (d)  not enough info

33.       The coefficient of friction between rubber and wet asphault is _______  than the coefficient of friction between rubber and dry asphault.

(a)  smaller                   (b)  equal                      (c)  larger                      (d)  not enough info

34.       What is the common formula for work?

(a)  W = DFv                  (b)  W= Fd                     (c)  W = Fd2                   (d) W = F2d

35.       When a force is exerted on an object, work is done only if the object

(a)  pushes back            (b)  remains stationary      (c)  has no momentum           (d)  moves

36.       One definition of power is

(a)  force exerted per unit distance                    (b)  work done per unit time

(c)  the amount of energy expended                    (d)  force applied multiplied by time interval

37.       Which of the following energy forms is associated with an object in motion?

(a)  gravitational potential energy                      (b)  elastic potential energy

(c)  mechanical energy                                       (d)  kinetic energy

38.       A skier with a mass of 88 kg hits a ramp of snow at 16 m/s and becomes airborne.  At the highest point of flight. The skier is 3.7 m above the ground.  What is the skier’s gravitational potential energy at this point?

(a)  1800 j                     (b)  3200 J                    (c)  6400 J                     (d)  1400 J

39.       Which of the following has the greatest momentum?

(a)        truck with a mass of 2250 kg moving at 25 m/s

(b)        car with a mass of 1210 kg moving at 51 m/s

(c)        truck with a mass of 6120 kg moving at 10 m/s

(d)        car with a mass of 1540 kg moving at 38 m/s

40.       A collision in which kinetic energy is conserved is called a(n)

(a)  elastic        (b)  inelastic      (c)  perfectly inelastic                (d)  both b and c

41.       The largest change in momentum will be produced by a

(a)  short force acting over a short time             (b)  small force acting over a long time

(c)  large force acting over a short time              (d)  large force acting over a long time

42.       When a golf club hits a golf ball, the change in momentum of the ball is _____ the change in momentum of the club.

(a)  equal to                  (b)  greater than            (c)  less than

43.       When a golf club hits a golf ball, the change in velocity of the ball is _____ the change in velocity of the club.

(a)  equal to                  (b)  greater than            (c)  less than

44.       p/3 radians is how many degrees?

(a)  30              (b)  45              (c)  60               (d)  90

45.       If an object has a tangential acceleration of 10.0 m/s2, the angular speed will do which of the following?

(a)  decrease     (b)  stay the same         (c)  be zero                   (d)  increase

46.       For an object moving with circular motion, the direction of the centripetal acceleration

(a)  is tangent to the circle                     (b)  around the circumference of the circle (c)  away from the circle                                 (d)  toward the center of the circle

47.       According to Newton’s law of universal gravitation, the force of attraction between any two masses is directly related to

(a)  the distance between the masses                 (b)  the product of the two masses

(c)  the velocity of the two masses                     (d)  the sum of the two masses

48.       A boy and a girl are pushing on opposite sides of a door.  The boy applies  25 N of force, and the girl applies 30 N of force.  Who creates more torque on the door?

(a)  the boy       (b)  the girl       (c)  both are the same               (d)  need more info

49.       If an object is rotating and its mass is redistributed to have more of its mass closer to the axis of rotation, its angular speed will

(a)  increase      (b)  decrease                 (c)  stay the same          (d)  be zero

50.       If the following objects have the same mass and radius, which would be the hardest to rotate?

(a)  a solid sphere          (b)  a hollow sphere       (c)  a solid cylinder        (d)  a hoop