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Q 1/43
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1. An elephant and a man fall from the same height and at the same time, who will hit the ground first? (no air resistance)
30
They hit at the same time
the women
The man
the elephant
Q 2/43
Score 0
2. Which falls faster. A sphere, or the sphere split into two halves? Explain your answer.
(no air resistance)
30
The left half
they both fall at the same rate
The right half
43 questions
Q.
1. An elephant and a man fall from the same height and at the same time, who will hit the ground first? (no air resistance)
1
30 sec
Q.
2. Which falls faster. A sphere, or the sphere split into two halves? Explain your answer.
(no air resistance)
2
30 sec
Q.
3. One ball is dropped at the same time that the other ball is thrown horizontally. Which ball hits the ground first. Explain your answer
3
30 sec
Q.
4. A cannon shot a projectile with a horizontal velocity of 30 m/s, from a height of 5 meters.
How would increasing the height affect the range of the projectile shot from the cannon?
4
30 sec
Q.
5. A cannon shot a projectile with a horizontal velocity of 30 m/s, from a height of 5 meters.
How would decreasing the height affect the range of the projectile shot from the cannon?
5
30 sec
Q.
6. A cannon shot a projectile with a horizontal velocity of 30 m/s, from a height of 5 meters.
How would increasing the velocity affect the range of the projectile shot from the cannon?
6
30 sec
Q.
7. A cannon shot a projectile with a horizontal velocity of 30 m/s, from a height of 5 meters.
How would decreasing the velocity affect the range of the projectile shot from the cannon?
7
30 sec
Q.
8. If two objects were thrown horizontally with different velocities from the same height, would the object with the faster velocity hit the ground first?
8
30 sec
Q.
9. Does the centripetal force vector point toward the center of the circle or point at a right angle to the circle?
9
30 sec
Q.
10. Does the tangental force vector point toward the center of the circle or point at the right angle to the circle?
10
30 sec
Q.
11. The cannon shot a projectile with velocity of 15m/s and an angle of 20 degrees reaching a range of 14.08 for trajectory A. What happens to range when shot from 30 degrees?
11
30 sec
Q.
12. The cannon shot a projectile with velocity of 15m/s and an angle of 20 degrees reaching a range of 14.08 for trajectory A. What happens to range when shot from 45 degrees?
12
30 sec
Q.
13. What angle must a cannon shoot a projectile from, to produce a trajectory that reaches the greatest range?
13
30 sec
Q.
14. A green car has a momentum of 1200 kg*m/s, a yellow car with the same mass as the green car, but is moving with twice the speed of the green car. Describe the momentum of the yellow car.
14
30 sec
Q.
15. Two runners are running with the same speed. Explain why one of the runners has twice the momentum.
15
30 sec
Q.
16. Two trucks have the same mass. Explain why one of the trucks have half the momentum.
16
30 sec
Q.
17. A dark colored ball collides with a light colored ball which is at rest. After colliding, both move in different directions. What type of collision occurred?
17
30 sec
Q.
18, Explain the reason that a green ball has the same momentum as a red ball after a collision.
18
30 sec
Q.
19. Name a renewable energy source
19
30 sec
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20. Name a non-renewable energy source
20
30 sec
Q.
21. What type of Electromagnetic wavelength has the shortest wave length?
21
30 sec
Q.
22. Which wave have the most energy X-rays or infrared.
22
30 sec
Q.
23. Which wave have the highest frequency ultraviolet or gamma? Explain your answer.
23
30 sec
Q.
24. Which wave have the longest wavelength?
24
30 sec
Q.
25. What is the nuclear process that occurs on the sun to produce energy?
25
30 sec
Q.
26. What is the nuclear process that occurs in nuclear power plant to produce energy?
26
30 sec
Q.
27. A white ball with a potential energy of 196 J, what is the potential energy of the blue ball with half the mass and at the same height of the white ball?
27
30 sec
Q.
28. Which has the greatest potential energy a 10kg rock at a height of 4 meters on Earth or a 10 kg object on Mars at the same height?
28
30 sec
Q.
29. A runner jogs with a speed of 2 m/s has a kinetic energy of 1000 J, the same runner doubles his speed. How much does his kinetic energy increases?
29
30 sec
Q.
30. runner with half the mass as another runner and runs with a speed of 2 m/s. How does half the mass affect the kinetic energy?
30
30 sec
Q.
31. What happens to kinetic energy when mass deceases?
31
30 sec
Q.
32, What happens kinetic energy when velocity increases
32
30 sec
Q.
33. What happens to potential energy when mass decreases?
33
30 sec
Q.
34. What happen to potential energy when height increases?
34
30 sec
Q.
35. What to happens to work if force doubles?
35
30 sec
Q.
36. What happens to work if distance is decease by half ?
36
30 sec
Q.
37, When work output increases by 2 times, what happens to the efficiency?
37
30 sec
Q.
38, When work input increase by 3 times, what happens to the efficiency?
38
30 sec
Q.
39, When work output decreases by 5 times, what happens to the efficiency?
39
30 sec
Q.
40. When work input decrease by 4 times, what happens to the efficiency?
40
30 sec
Q.
41. Power increases by 2 times, what happens to work?
41
30 sec
Q.
42. Power increases by 4 times, what happens to time?
42
30 sec
Q.
43. Work increases by 3 times, what happens to power?
