The acceleration due to gravity on the surface of Mars is about one third the acceleration due to gravity on Earth's surface. The weight of a space probe on the surface of Mars is about

Newton's third law of motion describes

In which of the following are action and reaction forces involved?

The product of an object's mass and velocity is its

What is conserved when two objects collide in a closed system?

What is the momentum of a 50-kilogram ice skater gliding across the ice at a speed of 5 m/s?

What force is responsible for the repulsion between two positively-charged particles?

When opposite poles of two magnets are brought together, the poles

Which universal force acts only on the protons and neutrons in a nucleus?

With which of the following is the weak nuclear force associated?

Which of the following universal forces is the weakest?

As an astronaut travels far away from Earth, her weight

The gravitational force between two objects increases as mass

The force that keeps an object moving in a circle is called

The centripetal force acting on a satellite in orbit

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