A force of 6.0 Newton’s is applied to a block at rest on a horizontal frictionless surface over a 7.0 meter span. How much energy is gained by the block.

42J

Explanation:

Given parameters:

Force applied  = 6N

Distance moved  = 7m

Unknown:

Amount of energy gained by the block  = ?

Solution:

The amount of energy gained by the block is the same as the work done on the block.

The work done is the force applied to move the block through a distance;

 Energy gained  = force x distance  = 6 x 7  = 42J

b.

explanation:

10.0

the independent variable, or the one that is intentionally manipulated is the speed.