Download Review for Test - Duplin County Schools

Review for Test
1. A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts
down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope,
its speed is 22 m/s. What is its average acceleration?
2. A cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. What is his acceleration ?
3. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard’s
average acceleration?
4. A car accelerates at a rate of 3.0 m/s2. If its original speed is 8.0 m/s, how many
seconds will it take the car to reach a final speed of 25.0 m/s?
5. A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s2. If
the cart has a beginning speed of 2.0 m/s, what is its final speed?
6. A vehicle travels 2345 m in 315 s toward the evening sun. What is its velocity?
7. What distance will a car traveling 65 km/hr travel in 3.0 hrs?
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8. How much force is required to accelerate a 2 kg mass at 3 m/s ?
2
9. Given a force of 100 N and an acceleration of 10 m/s , what is the mass?
10. What is the acceleration of a 24 kg mass pushed by a 6 N force?
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11. How much force is required to accelerate an 8 kg mass at 5 m/s ?
12. What is the acceleration of an 18 kg mass pushed by a 9 N force?
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13. How much force is required to accelerate a 50 kg mass at 2 m/s ?
2
14. Given a force of 56 N and an acceleration of 7 m/s , what is the mass?
15. What is the weight of a 7.0-kilogram bowling ball on Earth’s surface?
16. What is the mass of a 55N man on the Earth’s surface?
17. What is the weight of a baby carriage with a mass of 2kg?
18. 100 grams of a liquid completely fill a 200 mL bottle. What is the density of the
liquid?
19. A solution has a density of 1.50 g/mL. How many grams are needed to obtain
10.0 mL of solution?
20. If a block of copper measures 2.00 cm x 4.00 cm x 5.00 cm and weighs 356
grams, what is its density?
21. A piece of silver has a mass of 2800 grams and occupies a volume of 266 cm3.
What is the density of silver?
22. A man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s2. What
amount of force acted on the ball?
23. You push a friend sitting on a swing. She has a mass of 50 kg and accelerates at a
rate of 4 m/s2. Find the force you exerted.
24. How much force would it take to push another, larger friend who has a mass of 70
kg to accelerate at the same rate of 4 m/s2?
25. A little boy pushes a wagon with his dog in it. The mass of the dog and wagon
together is 45 kg. The wagon accelerates at 0.85 m/s2. What force is the boy
pulling with?
26. A 68 kg runner exerts a force of 59 N. What is the acceleration of the runner?
27. A stalled car is pushed with a force of 342 N from rest. How far does the car
travel in 12 seconds is it's mass is 989 kg?
28. What is the acceleration of a 24 kg mass pushed by an 8 N force?
29. What is the acceleration of a 24 kg mass pushed by an 8 N force?
30. What is the acceleration of a 7 kg mass pushed by a 3.5 N force?
31.
Which letter shows the ball when it
has the maximum kinetic energy?
32.
Which letter shows the ball when it has the maximum potential energy?
33. Galileo drops a 5.0 kg cannonball from the Leaning Tower of Pisa, a height of
12 m. What is the change in the gravitational potential energy of the cannonball
from the top of the tower to the ground?
34. A book is sitting on top of a 13m shelf. The book has a potential energy of 47J.
What is the mass of the book?
35. There is a 14kg baby carriage with a gravitational potential energy of 45J. What
is the height of the hill the carriage is on?
36. Candice is sitting on top of a 9m slide. Candice has a mass of 80kg. How much
gravitational potential energy does Candice have?
37. A 882kg car has a gravitational potential energy of 1378J. How high is the hill
the car is sitting on?
38. Rodger Maris swung a bat which had a mass of 2 Kg at a velocity of 45 m/s.
How many joules of kinetic energy could he give to a ball?
39. Barry Bonds swings a bat which has a mass of 1.5 Kg at a velocity of 55 m/s.
How many joules of kinetic energy could he give to a ball?
40.
An army tank of 2.5 x 104 kg mass has a kinetic energy of 1.25 x 106 J.
Calculate the speed of the tank.
41. Determine the kinetic energy of a 300 kg space probe launched from the surface
of Mars, once it has reached escape velocity of 5.1 km/s.
42. Calculate the KE of a car, which has a mass of 1000 kg and is moving at the rate
of 20 m/s.
43. How much work is done by a crane that lowers 1,000 newtons of material a
distance of 150 meters?
44. How much work is done when a 1 kilogram mass is raised a vertical distance of
1 meter?
45. A student who weighs 500 newtons climbed the stairs from the first floor to the
third floor, 15 meters above, in 20 seconds.
a. How much work did she do?
b. What was her power?
46.
46. A box is pushed across the floor for a distance of 5 meters with a force
of 50 newtons in 5 seconds.
a. How much work is done?
b. What is the power?
47.
A woman lifts a 300 newton child a distance of 1.5 meters in 0.75 seconds.
What is her power output in lifting the child?
48. How much work is done when a 5N force moves a block 4m?
49. How much force is needed to move a 11kg block 12 m, if 13J of work was used?
50. How much power does it take to move a 30kg block 12 m in 5s?
51. What is the mass of a block that is moved 17m in 10s with a power of 2.5J?
52. How much power does it take to do 500J of work in 10s.
53. How long does it take for Tiffany to work 347J if she uses a power of 50W?
54. How much work can be done by a 20W motor in 5s?
55. How much work can be done by a 33W motor in 23s?