How do simple machines make work easier?

a. they change the strength or direction of a force.

b. they maintain the distance of a force.

c. they apply force quickly.

d. they decrease the power available.

What is work? how much work is done to move an object 0 meters?

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.