A sports car and a moving van are traveling at a speed of 30 km/h. If the same b

Question

A sports car and a moving van are traveling at a speed of 30 km/h. If the same braking force is applied to both, which will stop first? Why? 5. 6. Why does it take more force to push a car at rest than to keep a car moving? 7. According to Newton's third law of motion, if you apply a force of 3 N to a wall, the wall 8. A planet is discovered that is the same size (volume) as Earth, but has twice as much mass. must apply a force of Non you If your weight on Earth were 750 N, what would be your weight on that planet?

Explanation / Answer

5) Van.

The object with the least mass will be easier to stop because it will have less momentum.

6) For something to accelerate it has to receive energy from something else (if not gravity) whereas to stay in motion requires only that it's stored (kinetic) energy not be removed from it which usually involves friction or gravity.

7) 3 N

8) 750 N as gravitational acceleration is same.

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