movement of energy

Question 1

A ball of mass 0.2kg is launched vertically with 3.6J of KE. How high does it travel?

Answer 1

1.8m

Question 2

A ball of mass 0.1kg falls from a height of 8m and lands with a speed of 5m/s. How much work is done against air resistance as it falls?

Answer 2

6.75J

Question 3

Which of the following describes the correct relationship between kinetic energy, mass and speed?

Answer 3

KE = ½mv²

Question 4

A brick of mass 5kg falls off a builder’s ladder from a height of 7.2m. At what speed does it hit the ground?

Answer 4

12m/s