Download Basic Physics Semester 1 Final Review Thing Name: Basic Physics

Basic Physics Semester 1 Final Review Thing
Name: Basic Physics Student
Date:
1. The momentum of an object is defined as
A) the object’s mass times it acceleration
B) the object’s mass times its velocity
C) the object’s force times its acceleration
D) the object’s force times the time interval
2. Which has more momentum, Billy Bob in a large truck moving at 30 miles per hour or Willy
Wong in a small truck moving at 30 miles per hour?
3. If a car runs directly into a wall, the force of the impact is large or small?
4. A 4-kg ball is thrown at 9 m/s. What is the ball’s momentum?
5. A ball is moving at 3 m/s and has a momentum of 36 kg m/s. What is the ball’s mass?
6. A 9-kg ball has a momentum of 18 kg m/s. What is the ball’s speed?
7. A moving freight car runs into an identical freight car at rest on the track. The cars couple
together. Compared to the velocity of the first car before the collision, the velocity of the
combined cars after the collision is?
A) twice as large
B) the same
C) one half as large
D) zero
8. Two bikers with the same mass and speeds travel towards each other and stick at collision. After
the collision the velocity of the bikers is?
A) twice the original velocity
B) the same as the original velocity
C) one half the original velocity
D) zero
9. A 4-kg chunk of putty moving at a 8m/s collides with and sticks to a 12-kg bowling ball that is
initially at rest. The bowling ball with its putty will then be set in motion with a velocity of?
10. A 43-kg boy is running 14 m/s towards a wall. He runs into the wall and exerts an unknown
force against the brick wall for 2 s. How much force did he exert?
11. Which of the following does not describe work?
A) Work is the application of force
B) Work is measured in watts
C) Work is force times distance
D) Work is the movement of something by force
12. Power is…
A) measured in joules
B) measured in Newton • meters
C) a rate of work
D) stored energy
13. Potential energy
A) is energy due to the position of something
B) is measured in watts
C) is measured in Joules per second
14. If Ben Dover lifts 3 loads up one story, how much work does he do compared to lifting just 1
load up one story?
15. If Shoving Sheila pushes an object with three times the force for twice the distance, she does
how much more work?
16. How many joules of work are done on an object when a force of 15N pushes it 9m?
17. The unit of work is
A) newton
B) watt
C) joule
18. How much power is required to do 200 J of work on an object in 6 seconds?
19. Potential energy is the energy that is
A) in motion
B) in use
C) stored
D) lost
20. How much work is done on a 150-N rock that you carry horizontally across a 30 m room?
21. How much work is done on a 150-N rock that Oliver Clothesoff lifts 5 m vertically?
22. How much power is used if I.P. Freely lifts a 500-N rock 1.5 meters in 5 seconds?
23. Suppose a moving car has 18000 J of kinetic energy. If the car’s speed quadruples, how much
kinetic energy would it then have?
24. An arrow in a bow has 120 J of potential energy. Assuming no loss of energy due to heat, how
much kinetic energy will it have after it has been shot?
25. Energy is changed from one form to another with no net loss or gain – true or false?
26. The idea in the previous question is known as…
A) Magic
B) Common sense
C) The law of conservation of mass
D) The law of conservation of energy
27. Lazy Lucy has the option of lifting a barrel a vertical distance of 3 meters or can roll it up a 9
meter long ramp to the same elevation. Which will require less force?
28. A job is done slowly and an identical job is done by another person quickly. Both jobs require
the same amount of work but different amounts of…
A) Energy
B) Power
C) Both a and b
D) None of the above
29. Which requires more work: lifting a 20 kg sack vertically 1.5 meters or lifting a 10-kg sack
vertically 3 meters?
30. It takes Jacques Strap 80 J to push a large box 4 m across a floor. Assuming the push is in the
same direction as the move, what is the magnitude of the force on the box?
31. An object that has kinetic energy must be
A) Moving
B) Falling
C) Elevated
D) At rest
32. If a skater’s speed increases so they have three times the momentum, then their kinetic energy
increases by how much?
33. All simple machines ideally work on the principle that…
A) impulse equals momentum change
B) force equals mass times acceleration
C) kinetic energy transforms into potential energy
D) work input equals work output
34. The ratio of output force to input force of a simple machine is called the…
A) Fulcrum
B) Pivot point
C) Efficiency
D) Mechanical advantage
35. Amanda Huggenkiss can easily lift a 100-N rock with the help of a lever. When she pushes
down with 10 N of force, she lifts the rock 0.5 meters. How far does she move her arms to do
this?
36. A pulley system can…
A) Change the direction of a force
B) Multiply the force
C) Increase the amount of work done
D) Both a and b
37. The ratio of useful work output to total work input (times 100) is called the …
A)
B)
C)
D)
Fulcrum
Pivot point
Efficiency
Mechanical advantage
38. A frictionless inclined plane is 8m long and rests on a wall that is 2m high. How much force is
needed to push a block of ice weighing 300 N up the plane?
39. A certain jack has a theoretical mechanical advantage of 400. However, due to frictional forces,
the actual mechanical advantage is only 20. What is the efficiency of the jack?
40. Which type of lever has the input force and the output force moving in opposite directions?
A) Type 1
B) Type 2
C) Type 3
D) All the same
41. Which of the levers has the input force lying opposite the fulcrum with the output force in the
middle, like a wheelbarrow?
A) Type 1
B) Type 2
C) Type 3
D) None of the above
42. What is the relationship of the tension in the strings in a movable pulley and a 2 pulley system?
A) The tension in each string is doubled
B) The tension in each string is the same
C) The tension in each string is three times the total force
D) There is no tension
43. A fixed pulley is most like which kind of lever?
A) Type 1
B) Type 2
C) Type 3
44. A jumping bean jumps with the aid of a small worm that lives in the bean. If a bean of mass 0.2
kg jumps 2 cm from your hand into the air, how much potential energy has it gained in reaching
its highest point?
45. What is the speed of the bean as it lands back in the palm of your hand?
46. Which has more mass, a kilogram of lint or a kilogram of lemons?
A) the lint
B) the lemons
C) neither – they both have the same mass
D) depends on the machine the lint came out of
47. A sheet of paper can be withdrawn from under a container of milk without toppling it if the
paper is jerked quickly. The reason this can be done is that…
A) a milk carton has very little weight
B) there is an action-reaction pair operating
C) gravity pulls very hard on the milk carton
D) the milk carton has inertia
48. How much does a 3-kg bag of nails weigh in Newtons?
49. Strange as it may seem, it is just as hard to push a car on the moon as it is to push the same car
on earth. This is because…
A) the mass of the car is independent of gravity
B) the weight of the car is independent of gravity
C) Nonsense! A car is much more easily pushed on the moon than on the earth
50. A large woman weighing 1800 N sits on the floor. The floor exerts a force on her of …