forces review!

Front

What direction does the force of gravity always point?

Back

Straight down.

Front

What direction does the normal force point when an object is at rest on a surface?

Back

Up.

Front

In a frictionless system with two masses connected by a rope over a pulley, which direction will the lighter mass accelerate?

Back

To the right.

Front

When a mass hangs from a spring and is not moving, what direction does the spring force act on the mass?

Back

Up.

Front

If a spring is in extension (stretched out), what direction does the spring force act on the object attached to it?

Back

Left.

Front

Define 'force'.

Back

A push or pull on an object resulting from its interaction with another object.

Front

What is the formula for calculating weight?

Back

Weight = mass × gravitational acceleration (W = mg).

Front

What is the role of friction in motion?

Back

Friction opposes the relative motion between two surfaces in contact.

Front

Explain the concept of normal force.

Back

The normal force is the support force exerted upon an object that is in contact with a stable surface.

Front

What happens to the acceleration of an object when the net force acting on it is zero?

Back

The object remains at rest or continues to move at a constant velocity.