The starter and exit quiz of the lesson “Calculating energy changes (Ek and Ep)”, from the unit “Energy of moving objects” (Year 10 Science) by Oak National Academy.
Free to use. Edit it, share it and hand it out to your students.
Oak National Academy
12 questions
Match each symbol in the equations E_p = mgh and E_k = ½mv^2 with the quantity it represents.
Match each quantity with its unit.
Which of these statements are correct?
An eagle with mass 4.0 kg flies at speed 15 m/s. How much energy is in its kinetic store?
A book of mass 1.6 kg falls off a shelf onto the floor. The shelf is 2.0 m above the floor. What is the change in energy in the gravitational store? (Use g = 10 N/kg.)
An apple of mass 200 g falls from a branch that is 150 cm above the ground. What is the change in energy in the gravitational store? (Use g = 10 N/kg.)
The principle of ___ states that total amount of energy at the end of a process is always the same as the total amount of energy at the beginning.
A rock on a cliff has 1600 J of energy in the gravitational store. It falls off the cliff onto the ground below. During the fall, no energy is dissipated. What is the energy transfer during the fall?
A 0.20 kg ball is thrown straight upwards and reaches a maximum height of 2.1 m. The ball’s kinetic energy at the start is ___ J. (Assume no energy is dissipated. Use g = 10 N/kg.)
A plate is dropped. If no energy is dissipated during the fall, the final speed of the plate before it hits the ground is 4 m/s. If energy is dissipated, which of these statements is correct?
A child sledges down a hill of height 12 m. The total mass of child and sledge is 30 kg. At the bottom, the kinetic energy is ___ J. (Assume no energy is dissipated. Use g = 10 N/kg.)
A mountain goat with mass 52 kg jumps straight upwards, leaving the ground at speed 6.0 m/s. The maximum height it can reach is ___ m. (Use g = 10 N/kg.)
