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 = 
mv2
= 15.306 J
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