Unit 2 Test

Front

What is gravitational pull?

Back

Gravitational pull is the force exerted by a mass that attracts other masses towards it. It is responsible for keeping planets in orbit and causing objects to fall towards the Earth.

Front

What happens to an object when an unbalanced force acts on it?

Back

When an unbalanced force acts on an object, it causes the object to accelerate in the direction of the net force.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

Front

What causes tides on Earth?

Back

Tides are caused by the gravitational pull of the Moon and the Sun on Earth's oceans, leading to the rise and fall of sea levels.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravity alone, where it experiences weightlessness.

Front

How do you calculate force?

Back

Force is calculated using the formula: Force (F) = Mass (m) × Acceleration (a). The unit of force is Newton (N).

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, calculated as Weight = Mass × Gravitational Acceleration (9.8 m/s² on Earth).

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It occurs when an object speeds up, slows down, or changes direction.

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion. Unbalanced forces cause a change in motion.

Front

What is the formula for calculating gravitational force between two objects?

Back

The gravitational force (F) between two objects is calculated using Newton's law of universal gravitation: F = G * (m1 * m2) / r², where G is the gravitational constant.