Force

Question 1 of 10

A spring extends 4 cm under 2 N. What load gives an extension of 10 cm (within the elastic limit)?

Question 2 of 10

Oiling the moving parts of a bicycle reduces

Question 3 of 10

Friction always acts

Question 4 of 10

What is the weight of a 50 kg student? (Take g = 10 N/kg.)

Question 5 of 10

Which force keeps the planets in orbit around the sun?

Question 6 of 10

A 10 N force acts at the end of a 0.3 m spanner. The moment is

Question 7 of 10

Which instrument measures force?

Question 8 of 10

A box of mass 5 kg is pushed with a net force of 20 N. What is its acceleration?

Question 9 of 10

A 10 kg box on a level floor needs 30 N to move it at constant speed (g = 10 m/s²). The coefficient of friction is

Question 10 of 10

A spring stretches 2 cm with a 4 N load. With a 10 N load (within its limit) it stretches