Forces - Grade 7

Front

What is a force?

Back

A force is a push or pull acting upon an object as a result of its interaction with another object.

Front

What are the effects of force on an object?

Back

Force can change the object's speed, direction, and shape.

Front

What is constant speed?

Back

Constant speed means that an object is moving at the same rate over time without speeding up or slowing down.

Front

What are the two main forces acting on a floating boat?

Back

The two main forces are upthrust (buoyant force) and weight (gravitational force).

Front

What is the magnitude of gravity on Earth?

Back

The magnitude of gravity on Earth is approximately 10 N/kg.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

How can friction be increased?

Back

Friction can be increased by making the surface rougher.

Front

What is upthrust?

Back

Upthrust is the upward force exerted by a fluid that opposes the weight of an object immersed in it.

Front

What is weight?

Back

Weight is the force exerted on an object due to gravity, calculated as mass times the acceleration due to gravity (W = mg).

Front

What is the relationship between mass and weight?

Back

Weight is directly proportional to mass; as mass increases, weight increases.