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- 1. Multiple ChoicePeanut ran 50 meters in 10 seconds. What was Peanut's average speed?2 m/s5 km/h5 m/s5 m/s North
- 2. Multiple ChoiceIf we drop a steel sphere and a ping pong ball, the steel sphere will...hit the ground first because it has more masshit the ground second because it takes longer to acceleratehit the ground at the same time as the ping pong ball
- 3. Multiple ChoiceThe force of __________________ is a type of friction that works against the motion of falling objects.Terminal VelocityGravityFree FallAir Resistance
- 4. Multiple Choice
The greater the mass of an object,
the easier the object starts moving.
the greater its inertia.
the more balanced it is.
the more space it takes up.
- 5. Multiple Choice
The momentum of an object is in the same direction as its
force.
velocity.
acceleration.
inertia.
- 6. Multiple Choice
The overall force on an object after all the forces are added together is called the
balanced force
unbalanced force
net force
centripetal force
- 7. Multiple Choice
The force of gravity between you and Earth is greater than the force of gravity between you and a car because Earth has more ____________________ than the car.
mass
density
force
friciton
- 8. Multiple Choice
A skydiver with a mass of 70 kg accelerates to Earth at a rate of 9.8 m/s2 due to gravity. What is the force on the skydiver?
79.8 Newtons
7.14 Newtons
0.14 Newtons
68.60 Newtons
- 9. Multiple Choice
The acceleration during the whole trip, on the horizontal component, is always...
0 m/s2
3.6 m/s2
5 m/s2
-9.8 m/s2
- 10. Multiple Choice
In a projectile motion like the shown on the picture, the velocity with which the projectile hits the ground is...
0 m/s
the same as the initial velocity
unknown
9.8 m/s
- 11. Multiple ChoiceIn the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves.TrueFalseSometimes trueSometimes false
- 12. Multiple ChoiceAt the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first?Neither- they hit at the same timethe horizontally thrown ballthe dropped ballNone of these
- 13. Multiple ChoiceIf you throw a baseball straight up, what is its acceleration at the highest point?-9.8 m/s2-9.8 m/s0 m/s20 m/s
- 14. Multiple Choice
At what point is vy= 0 m/s?
A
B
C
D
None of these points
- 15. Multiple Choice
Which vector pair (arrow pair) correctly represents the acceleration and velocity at point P?
- 16. Multiple ChoiceA horse gallops around a circular arena. The centripetal force on the horse is ___.directed outwardtensiondirected toward the center of the arena9.8 N
- 17. Multiple ChoiceHow much work is being done with 200 N of force over 426 meters?85,200 J45,620 J90,480 J62,329 J
- 18. Multiple ChoiceIf 150 Joules of work is needed to move a box 10 meters, what force was used?1500 N15 N1.5 N150 N
- 19. Multiple ChoiceWhat is the kinetic energy of a 9 kg book that has a speed of 4 m/s?18 J36 J72 J144 J
- 20. Multiple ChoiceWhat is the potential energy done in lifting a 50 kg barbell 6 m above the floor?150 J300 J1470 J2940 J
- 21. Multiple ChoiceAt which point is potential energy greatest?WXYZ
- 22. Multiple Choice
If an object changes its speed and direction it is
changing
moving
accelerating
- 23. Multiple Choice
What is Newton's 3rd Law?
an object at rest stays at rest unless acted upon by an outside force and an object in motion will stay in motion unless acted upon by an outside force
Force = mass x acceleration
For every action there is an equal and opposite reaction
- 24. Multiple Choice
The type of friction occurring when an object is not moving
Static Friction
Rolling Friction
Air Friction
Sliding Friction
- 25. Multiple ChoiceThe following number in scientific notation is
0.0005621 = _____5.621 x 1045.621 x 10-55.621 x 10-456.21 x 102 - 26. Multiple Choice
What is the Equation for Force applied to a Spring?
Force applied to a Spring = Spring Constant x Extension
Force applied to a Spring = Spring Constant / Extension
Force applied to a Spring = Extension / Spring Constant
- 27. Multiple Choice
What is another Equation for Power?
Power = Potential Difference x Current
Power = Potential Difference / Current
Power = Current / Potential Difference
- 28. Multiple ChoiceA 500. Newton girl lifts a 10. newton box vertically upward a distance of 0.50 meter. The work done on the box.50. J5.0 J250 J2500 J
- 29. Multiple ChoiceA 100.-kilogram cart accelerates at 0.50 meter per second squared west as a horse exerts a force of 60. newtons west on the cart. What is the magnitude of the force that the cart exerts on the horse?60. N50. N100 N70 N
- 30. Multiple ChoiceWhat is the net force?4.2 N left4.2 N right2.2 N left2.2 N right
- 31. Multiple ChoiceWhich of these is evidence that a force has acted on an object?Change in the object's mass.A stationary object lying on the ground.Change in the direction of the object's motion.The object moving in a straight line at constant velocity.
- 32. Multiple ChoiceIn which direction will the box accelerate?Down and to the leftUp and to the rightUp and to the leftDown and to the right
- 33. Multiple ChoiceIf there are two forces going in the same direction how would you find the net force?SubtractAddNeitherMultiply
- 34. Multiple ChoiceWe often say that g = -9.8 m/s2. The lowercase g represents:the speed of gravitythe velocity of gravitythe acceleration of gravitythe force of gravity
- 35. Multiple ChoiceFill in the blanks: _____ does not change from place to place, but _____ can change because of differences in the strength of gravitational pull.acceleration, weightweight, accelerationmass, weightweight, mass
- 36. Multiple ChoiceGravity pulls an object down with 49 N of force and a rope pulls the object up with 50 N of force. What is the net force?1 N upward1 N downward0.98 N upward0.98 N downward
- 37. Multiple ChoiceThere is a small amount of friction as the sled shown is pulled to the left. The friction points:updownleftright
- 38. Multiple ChoiceWhat is the acceleration of a 50 kg object pushed with a force of 500 newtons?100 m/s225,000 m/s210 m/s225 m/s2
- 39. Multiple ChoiceNewtons 1st law of motion states:An object in motion will stay in motion and an object in rest will stay in rest unless acted upon by and unbalance force.For every action there is an equal and opposite reaction.Acceleration is produced when a force. acts on a mass.The greater the mass the greater the amount of force needed to change its motion.
- 40. Multiple Choice
A 75-kg wagon is being pulled in the horizontal direction by a 225-N force. There is a frictional force acting on the wagon of 38-N. What is the net force on this wagon?
187-N
112-N
225-N
38-N
- 41. Multiple Choice
What does it mean for an object to be in equilibrium? Select ALL correct answers.
It has no net force acting on it.
The forces acting on the object all cancel out.
The forces acting on an object balance out.
The sum of all the forces acting on an object is 0.
The object is ONLY at rest.
- 42. Multiple ChoiceWhich of the following converts chemical potential energy to kinetic (mechanical) energy?human bodycarairplaneall of the above
- 43. Multiple ChoiceA car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement?40 metres, South50 metres, South50 metres, North40 metres, North
- 44. Multiple ChoiceIn practice B of the figure, which displacement is the horizontal component?30 km, East30 km, West40 km, North40 km, South
- 45. Multiple ChoiceWhich of these is not a vector quantity?displacementtimevelocityacceleration
- 46. Multiple ChoiceThe time that a force acts on an object.MomentumImpulseDirect RelationshipIndirect Relationship
- 47. Multiple ChoiceAs one variable increases, so does another.MomentumImpulseDirect RelationshipIndirect Relationship
- 48. Multiple ChoiceAs one variable increases, the other decreases.MomentumImpulseDirect RelationshipIndirect Relationship
- 49. Multiple Choice
The coefficient of kinetic friction is ______ the coefficient of static friction
Less than
More than
Equal to
Unrelated to
- 50. Multiple Choice
Which force acts along the inclined plane?
parallel
perpendicular
- 51. Multiple Choice
What is the coefficient of kinetic friction for a box that is 215 kg being pushed with a force of 400 N at a constant velocity?
0.2
2
5
0.5
- 52. Multiple Choice
If no forces are acting on an object, its motion will:
continue in the same direction with the same speed.
slow down and eventually stop.
continue at the same speed but could change direction.
continue in the same direction but could change speed.
- 53. Multiple Choice
The graph shows the motion of a an object moving in a straight line. From the graph, you may conclude that:
the object is accelerating at a constant rate of 3.5 m/sec2.
the object is moving from left to right.
the object is weightless as if it were in outer space.
the total force acting on the object is zero.
- 54. Multiple Choice
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.
-2.5
-10
-18
-45
- 55. Multiple ChoiceThe difference between a car hitting a wall vs. a car hitting a hay stack isthe Impulse on the car hitting the wall is greaterthe change in momentum of the car hitting the wall is greaterthe force on the car hitting the hay stack is greaterthe collision time of the car hitting the hay stack is greater
- 56. Multiple ChoiceThe impulse-momentum theorem states thatthe impulse on an object is equal to the change in momentum it causesthe force on a moving object is equal to the magnitude of the impulse.the impulse on an object is greater than the change in momentum it causesthe impulse on an object is less than the change in momentum it causes
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