year 9 energy

Which energy store is energy usefully transferred to in a blender?

• Kinetic store of the blades

• Elastic potential store of the blades

• Magnetic store of the blades

• Internal store of surroundings

What happens to the kinetic energy store of a lorry as it slows down

• It decreases as energy is transferred to other stores

• It stays the same

• It decreases as energy is destroyed

• It increases

If a moving object doubles its speed, it doubles the energy in its kinetic store.

• False

• True

When an object falls from a height, the maximum energy transferred to the kinetic store is equal to...

• the energy transferred from its gravitational store

• the energy transferred to it gravitational store

• the energy in its chemical store

• its speed

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• The PE and KE increase and decrease together
• The PE decreases while the KE increases 
• Impossible to know without knowing the mass  

What is the unit of Potential Energy?

• m, mass
• kg, kilogram
• J, Joules
• m/s, meters/second

If the Total Mechanical Energy is 50J, Potential Energy is 40 J, what is the Kinetic Energy?

• 1 J
• 10 J
• 90 J

What is the v in this equation? Choose the one with the CORRECT unit!

• volume (m³)
• velocity (m/s)
• velocity (m/s²)
• volume (v)

What is the g? Choose the one with the correct unit!

• mass (kg)
• gravity (m/s)
• gravity (m/s²)
• grams (g)

As energy transformations occur within a system, the total energy of the system ___.

• increases
• decreases
• is transferred out of the system
• remains constant