Question

Inertia is defined as the tendency of an object to resist a change in motion. Objects moving in space tend to move in straight lines because of inertia. If this is the case, then why do planets orbit in elliptical paths?

A
The magnetic force caused by the lining up of the distant stars pushes the planets into curved paths.

B
The force of gravity between planets keeps them on a curved path and prevents them from leaving the solar system.

C
The force created by the nuclear fusion of the hydrogen in the Sun causes the planets' curved paths.

D
The speed of the planets and the gravitational pull of the Sun cause the planets' curved paths.

Answer 1

Answer:

B

Explanation:

Inertia is the tendency of an object to resist a change in its motion. Because of inertia, a resting object will remain at rest, and a moving object will keep moving. Objects with greater mass have greater inertia. To change the motion of an object, inertia must be overcome by an unbalanced force acting on the object.