Download Name - Hicksville Public Schools

Physics R
Date: __________________
Unit Conversion
1. How many kilograms are in 1 ton (2000 lb)?
2. You measure 72 inches on a tape measure. How long is this in cm?
1 kg = 2.2 lb
1 mile = 1600 m
1 inch = 2.54 cm
3. How long is 72 inches in meters?
4. Convert 35 m/s into miles/hour
Metric Estimation – Matching
5. Approximate length of a football field
6. Approximate length of a pencil
7. Approximate width of a classroom door
8. Approximate width of a person’s little finger
a.
b.
c.
d.
10-3 m
10-2 m
10-1 m
100 m
e. 101 m
f. 102 m
1D Motion
9. A man walks 300 m North and 200 m South. What is his distance and displacement?
10. A car speeds up from 10 m/s to 25 m/s over a distance of 60 m. What is its acceleration?
11. A 0.2 kg egg is dropped from the roof of a tall building. How fast is it going after 4 seconds?
12. A train with an initial speed of 20 m/s accelerates at a rate of 2 m/s2 for 12 seconds. How much
distance does it cover in this time?
13. A ball is thrown upward with a speed of 25 m/s. What height will it reach?
2D Motion
14. A man walks 300 m North and 300 m East. What is his distance and displacement?
15. A car driving 30 m/s drives off a cliff. What is its vertical speed after 0, 1, and 2 seconds?
16. A car driving 30 m/s drives off a cliff. What is its horizontal speed after 0, 1, and 2 seconds?
17. A soccer ball is kicked with an initial velocity of 18 m/s an angle of 27 degrees from the horizontal.
What is the horizontal and vertical component of the initial velocity?
18. (Continued from #17) What height will the soccer ball reach?
Newton’s Laws & Forces
19. How much force is necessary to keep a 10 kg object moving at 30 m/s in frictionless space?
20. A 22 N net force acts on a box which accelerates it at a rate of 3 m/s2. What is the mass of the box?
21. A 10 N force West and a 15 N force East act on a 3 kg object. What is the acceleration of the
object?
22. A 50 N force is necessary to push a bicycle at constant velocity. What is the net force on the bike?
23. What is the weight of a 60 kg student?
24. A 100 kg ice skater pushes a 50 kg ice skater with 60 N. What is the force on the 100 kg ice skater?
25. How much force does the ground apply to hold up a 70 kg student? What is this called?
Friction
26. How much force is necessary to start moving a 6 kg steel box on steel?
27. How much force is necessary to push a 6 N wood block on a wood table with constant velocity?
28. It takes 70 N of force to start moving a 15 kg object. What is the static coefficient of friction on this
surface?
29. The coefficient of kinetic friction for painted wood on paint is 0.25. What is the force of kinetic
friction for a 20 N painted wood box on paint?
Impulse/Momentum
30. What is the momentum for a 95 kg football player traveling 3 m/s?
31. A 1200 kg car has a momentum of 20,000 kg m/s. How fast is it going?
32. A soccer player kicks a ball with a force of 200 N for 0.04 seconds. What is the impulse exerted on
the ball?
33. A soccer player kicks a 0.4 kg ball from rest to a speed of 23 m/s. What is the impulse exerted on
the ball?
34. An impulse of 30 Ns is exerted on a 3 kg mass, bringing it to rest. What was its initial momentum?
35. A 2000 kg car traveling at 17 m/s comes to a stop in 8 seconds. What was the average force
bringing the car to rest?
Conservation of Momentum
36. A 400 kg cannon at rest fires a 10 kg cannonball. If the cannon recoils at 2 m/s, how fast does the
cannonball travel?
37. A 1400 kg car traveling at 22 m/s collides with an 1800 kg car at rest. After the collision, the cars
stick together. What is the velocity of the two cars combined after the collision?
38. A 3 kg box traveling at 8 m/s collides with a 4 kg box at rest. After the collision, the 3 kg box is at
rest. How fast is the 4 kg box traveling?
39. Superman has a mass of 100 kg. If he launches off a 5000 kg bus and the bus flies back at 30 m/s,
how fast is Superman traveling immediately after launch?
1.
2.
3.
4.
5.
6.
7.
8.
9.
909 kg
183 cm
1.83 m
78.3 mi/hr
f
c
d
b
500 m, 100 m N
10.
11.
12.
13.
14.
15.
m/s
16.
m/s
4.38 m/s2
-39.2 m/s
384 m
31.9 m
600 m, 424 m
0 m/s, -9.8 m/s, -19.6
30 m/s, 30 m/s, 30
17.
18.
19.
20.
21.
22.
23.
24.
25.
16 m/s, 8.2 m/s
3.4 m
0N
7.3 kg
1.7 m/s2 E
0N
588 N
60 N
686 N, Normal Force
26.
27.
28.
29.
30.
31.
32.
33.
34.
43.5 N
1.8 N
0.476
5N
285 kg m/s
16.7 m/s
8 Ns
9.2 Ns
30 kg m/s
35.
36.
37.
38.
39.
4,250 N
80 m/s
9.6 m/s
6 m/s
1,500 m/s