Which of these is the best way to measure a force?

Forces can be

What is the unit of force called?

Why does an astronaut weigh less on the Moon than on the Earth?

What is the weight of a 20 kg box on the Earth?

What is the pressure exerted by a man standing on one leg?

The weight of a 100 N laser printer is spread over 0.5m2. What is the pressure it exerts?

What can we say about the forces on an object that is not moving?

What happens to the air resistance on a car as the car goes faster?

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

One way to increase the turning force on a spanner is to