Newton's laws

Force depends on:

• gravity

• mass

• acceleration

• mass and acceleration

What minimal force must be exerted by a mother to lift her 5kg baby?

Type answer with two decimals; no units

Answer explanation

F = m*a

In the finals, Rick kicks the 0.6 kg soccer ball with a force of 80 N. How much does he accelerates the ball?

Round answer to two decimals; no units

Answer explanation

F = m*a

Three women pushed a stalled car. Each woman pushes with a force of 425 N. What is the mass of the car if it accelerates at 0.85  $\frac{m}{s^2}$ .

No units

Answer explanation

F = m*a

A tennis ball with a mass of 0.1 kg is accelerated at a rate of 164  $\frac{m}{s^2}$ when hit a professional tennis player. What force does the racket exert on the ball?

Type answer with one decimal; no units

Answer explanation

F = m*a

How much does the box accelerate?

Type answer with one decimal; no units

Answer explanation

F = m*a

Is this boat moving?

• No

• Yes, it's decelerating

• Yes, it's accelerating

• Yes, it's moving at a constant speed