Question

A boy slides a book across the floor, using a force of 5 N over a distance of 2

m. What is the kinetic energy of the book after he slides it? Assume there is
no friction
O A. 20 j
O B. 2.5 j
O c. 5 j
O D. 10 j

Answer 1

Ek = force x distance
Ek = 5 x 2
Kinetic energy = 10 joules

Answer 2

Answer: D. 10 J

Explanation: Work is equal to the product of force and distance. Work is equal to energy. So the value for work is equal to energy.

W = Fd

= 5N ( 2 m )

= 10 J