Year 9 Forces & motion revision

Front

What does Newton's First Law state about an object at rest?

Back

An object at rest will tend to stay at rest unless acted upon by a net external force.

Front

What is the weight force acting on an object?

Back

Weight is the force acting on an object due to gravity, calculated as mass times the acceleration due to gravity (W = m * g).

Front

What is a free-body diagram?

Back

A free-body diagram is a graphical representation used to visualize the forces acting on an object.

Front

How do you calculate the resultant force in a tug of war?

Back

The resultant force is the difference between the forces exerted by each side. The side with the greater force wins.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) is calculated using the formula a = F/m, where F is the net force and m is the mass.

Front

What is the weight of an object with a mass of 10 kg?

Back

The weight is 100 N, calculated using W = m * g (where g = 10 m/s²).

Front

What happens to an object in motion according to Newton's First Law?

Back

An object in motion will tend to stay in motion at a constant velocity unless acted upon by a net external force.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is the relationship between mass and weight?

Back

Weight is the force due to gravity acting on a mass, calculated as W = m * g.

Front

What does a net force of zero indicate about an object's motion?

Back

A net force of zero indicates that the object is either at rest or moving at a constant velocity.