A 25 kg cart is moving at 2.0 m/s when a 5.0 N force is applied in the direction it is moving for a distance of 6.0 m. What is the kinetic energy of the cart at the end of the 5.0 m?

20 J

30 J

50 J

80 J
Is the answer 80?

Question

A 25 kg cart is moving at 2.0 m/s when a 5.0 N force is applied in the direction it is moving for a distance of 6.0 m. What is the kinetic energy of the cart at the end of the 5.0 m?

       20 J

       30 J

       50 J

       80 J
Is the answer 80?

anonymous · Answer

yes it is. You must first use F = ma to determine the acceleration, then an equation of motion to get the final speed. Use that final speed in the kinetic energy formula and I get the same answer.

anonymous · Answer

80 J