Integrated Science

1A 1,200 kg car moving at 20 m/s stops in 4 s. The braking force is

2A body at rest stays at rest unless acted on by an external force. This is

3A car increases its speed from 10 m/s to 30 m/s in 5 s. What is its acceleration?

4A trolley of mass 2 kg is pulled by a net force of 10 N for 3 s from rest. Its final speed is

5Passengers lurch forward when a bus brakes suddenly. This is because of

6Seat belts protect passengers by

7A force of 20 N acts on a 4 kg mass. What is the acceleration?

8A force of 20 N acts on a 4 kg mass. Its acceleration is

9Momentum is the product of

10A runner covers 400 m in 80 s. What is the average speed?