Motion and force

A car accelerates uniformly from 10 m/s to 30 m/s in 5 s. How far does it travel?

• 1 150 m
• 2 100 m
• 3 200 m
• 4 50 m

A projectile is launched at 45 degrees. For a given speed this angle gives:

• 1 Minimum range
• 2 Maximum height only
• 3 Maximum range
• 4 Zero range

A 2 kg mass moves at 5 m/s. What is its momentum?

• 1 2.5 kg m/s
• 2 25 kg m/s
• 3 10 kg m/s
• 4 7 kg m/s

In an elastic collision:

• 1 Only momentum is conserved
• 2 Both momentum and kinetic energy are conserved
• 3 Only energy is conserved
• 4 Nothing is conserved

Impulse is equal to the change in:

• 1 Energy
• 2 Mass
• 3 Velocity only
• 4 Momentum

A ball is thrown upwards at 20 m/s. What is the time to reach the top? (g = 10 m/s²)

• 1 4 s
• 2 1 s
• 3 20 s
• 4 2 s

A body of mass 4 kg is acted on by a net force of 20 N. Its acceleration is:

• 1 24 m/s²
• 2 80 m/s²
• 3 0.2 m/s²
• 4 5 m/s²

The area under a velocity time graph is the:

• 1 Acceleration
• 2 Momentum
• 3 Force
• 4 Displacement

The law of conservation of momentum applies when:

• 1 The system is hot
• 2 The speed is constant
• 3 The masses are equal
• 4 No external force acts on the system