Physicsmedium · Past Paper
A car starts from rest and reaches a speed of 20 m/s in 5 seconds. If its mass is 1000 kg, the net force is:
A4000 N
B5000 N
C200 N
D400 N
✓ Correct Answer: A — 4000 N
Acceleration a = (v-u)/t = (20-0)/5 = 4 m/s². Force F = ma = 1000 * 4 = 4000 N.
Share this question
More from Physics
- If a ball is thrown vertically upwards with a velocity of 40 m/s, what is the distance covered in the last second of its upward journey?
- If a body travels with uniform acceleration, the graph of 'v^2' against 's' is a:
- A body starts from rest and moves with uniform acceleration. The ratio of distance covered in 1s, 2s, and 3s is:
- How many Joules are there in 1 kilowatt-hour (kWh)?
- What is the unit of electric power?