Semester Exam Practice

Front

What is Newton's 1st 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 an unbalanced force.

Front

What are the units for work?

Back

Joules (J) are the units for work.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as mass (kg) x gravity (9.8 m/s²) x height (m).

Front

What happens to an object falling when air resistance equals gravity?

Back

The object falls at a constant speed and is not accelerating.

Front

Is inertia a force?

Back

False, inertia is the property of an object to resist changes in its state of motion.

Front

What is Newton's 2nd Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

Front

What is Newton's 3rd Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as Weight = Mass x Gravity.

Front

What is air resistance?

Back

Air resistance is a type of friction that acts against the motion of an object moving through air.