Physics

Grade-7

Easy

Question

# A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 N. The carriage comes down with a speed of 5 m/s. What is the kinetic energy of the carriage?

- 75 J
- 3 J
- 15 J
- 6 J

Hint:

### 15 J

## The correct answer is: 15 J

### m = kg

v = 5 m/s

KE = mv^{2}

= 15.306 J

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