Test: Forces and their effects - Year 7 MCQ

Mass remains constant regardless of the location or gravitational force acting on the object.

Jupiter has a higher gravitational acceleration (g) compared to Earth, so the weight of an object would be greater on Jupiter.

Weight is a force and therefore should be measured in newtons.

Terminal velocity is the maximum speed achieved by a falling object when the force of gravity is balanced by the drag force of the surrounding fluid (e.g., air).

Air resistance acts opposite to the motion of a falling object, reducing its net acceleration by counteracting the force of gravity. As speed increases, air resistance increases until it equals the gravitational force, at which point the object reaches terminal velocity and acceleration becomes zero.

Neptune has the highest gravitational acceleration among the listed planets, approximately 11.15 m/s², compared to Earth (~9.81 m/s²), Saturn (~10.44 m/s²), and Mars (~3.71 m/s²).

Magnets attract or repel at a distance, they do not need to touch the object they are acting on to have an effect.

Terminal velocity occurs when the force of gravity pulling an object downward is balanced by the drag force (air resistance) pushing upward.

Isaac Newton's law of universal gravitation explains the gravitational attraction between objects based on their masses and distance between them.

According to Newton's First Law, an object at rest will remain at rest unless acted upon by a net external force. If the net force is zero, there is no acceleration, and the object stays stationary.