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6. When a rocket is launched into the sky it moves upwards, why?
- The resultant force is zero
- The thrust is larger than both the gravity and drag
- The thrust is larger than only gravity or drag
7. An increase in kinetic energy means..
- A higher mass
- Half of the work done
- The amount of work done (but a little bit less due to wasted energy as heat)
- Work done multiplied by two
8. Which one involves direction?
9. When are the forces unbalanced?
- When there is no resultant force
- When the object is acceleration/speed increases
- When the object travels at a constant speed
10. What is kinetic energy?
- Movement energy
- Height energy
- Energy transferred
11. What does an object resting on a surface experience?
- A reaction force
- Movement force
12. What does the gradient on a distance-time graph represent?
13. When objects fall what happens?
- KE gained and GPE lost
- GPE gained and KE lost
- It smashes to pieces if it's not shatterproof
14. Can displacement be both positive and negative?
15. When/how is GPE increased?
- By lowering the height
- By doing work
- By moving the object
16. What is it called when an objects speed increases?
- Speed
- Accellaration
- Velocity
17. What do the arrows show on a diagram of an object?
- The speed of the object
- The type of friction
- The size/direction of forces
- The length of the object
18. When are forces balanced?
- When the resultant force changes
- When a car drives at a steady speed and the reaction of a surface
- When an object is speeding up
- When a rocket is going up into space
19. When the momentum is constant it means..
- Either the mass or velocity is constant
- Both the mass and velocity are constant
- The resultant force is not zero
20. Acceleration is..
- Distance travelled
- How quickly you're speeding up/change in velocity
- Speed/velocity