Mechanics Quick Check

1. A car accelerates uniformly from rest to 20 m/s in 5 s. What is its acceleration?

2. Which quantity is a vector?

3. A 2 kg object experiences a net force of 10 N. What is its acceleration?

4. According to Newton's third law, forces occur in pairs that are:

5. A ball is thrown horizontally. Ignoring air resistance, its vertical acceleration is:

6. Momentum is conserved in a collision when: