What is the kinetic energy of a 14 kg object moving at 14 m/s?
Answer and explanation
Correct answer: D. 1372 J
- Step 1: KE = 1/2 m v squared.
- Step 2: = 1/2 x 14 x 14 squared = 1372 J.
Answer
1372 J.
Why not the others: 2744 J, 98 J and 196 J do not fit.
Practise more Mechanics.
Free questions with an explanation for every one, and full timed Tahsili SAAT (Saudi Arabia) mock tests.
More Mechanics questions
- A train moving at 15 m/s brakes with a constant deceleration of 5 m/s squared. What distance does it travel before stopping?
- A train moving at 15 m/s brakes with a constant deceleration of 8 m/s squared. What distance does it travel before stopping?
- A train moving at 25 m/s brakes with a constant deceleration of 4 m/s squared. What distance does it travel before stopping?
- A train moving at 30 m/s brakes with a constant deceleration of 6 m/s squared. What distance does it travel before stopping?
- A 6 kg crate is pulled along a rough floor by a force of 91 N. Friction is 23 N. What is the acceleration?
- A 6 kg crate is pulled along a rough floor by a force of 50 N. Friction is 9 N. What is the acceleration?