Test study guide: Forces & Motion

Front

What is Newton's 2nd Law of Motion?

Back

Newton's 2nd Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula F=ma (Force = mass x acceleration).

Front

What is gravity?

Back

Gravity is a force of attraction between two masses. It depends on the mass of the objects and the distance between them.

Front

What does it mean for forces to be balanced?

Back

Balanced forces occur when two forces acting on an object are equal in size and opposite in direction, resulting in no change in motion.

Front

What does it mean for forces to be unbalanced?

Back

Unbalanced forces occur when the forces acting on an object are not equal, causing the object to accelerate in the direction of the net force.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It acts in the opposite direction to the movement.

Front

What factors affect the strength of gravity?

Back

The strength of gravity is affected by the mass of the objects and the distance between them.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object, and it is calculated by multiplying the mass of the object by the acceleration due to gravity (Weight = mass x gravity).

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 is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can occur due to a change in speed or direction.