Forces and Newtons Laws

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by a net external force.

Front

Define Net Force.

Back

The vector sum of all the forces acting on an object.

Front

What is the formula for calculating Net Force?

Back

F_net = m * a, where F_net is the net force, m is mass, and a is acceleration.

Front

What is Inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

How does mass affect inertia?

Back

The more mass an object has, the greater its inertia.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as weight = mass * gravity.

Front

If an object has a mass of 4 kg and is accelerating at 2 m/s², what is the net force acting on it?

Back

8 N (using F_net = m * a).

Front

What happens to the acceleration of an object if the net force acting on it is doubled?

Back

The acceleration will also double, assuming mass remains constant.

Front

What is the effect of friction on motion?

Back

Friction opposes the motion of an object, acting in the opposite direction to the applied force.

Front

What is the gravitational force on a 30 kg object on Earth?

Back

Approximately 294 N (using weight = mass * gravity, where gravity is about 9.8 m/s²).