Year 9 GCSE Physics (Downlands)

The temperature of a glass of water at 4 degrees is placed in a room at 20 degrees. Heat transfer will be

• Into the water
• To the surroundings
• There won't be any heat transfer

What is the equation involving force, distance and work done?

• Work = Force x distance
• Force = Work x Distance
• Distance = Work x Force

W=125 J
d=10 m
F=???

• 12.5 N
• 1250 N
• 0.08 N
• 135 N

Roger Federer’s tennis ball has a mass of 0.3 kg. If he holds the ball above the ground at a height of 2.0 m to serve, what is its gravitational potential energy (GPE)?

• 5.88 J
• 0.6 J
• 6.67 J
• 0.15 J

Tags

NGSS.MS-PS3-2

When a pendulum swings, at which point is kinetic energy highest: 

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When a pendulum swings, at which point is potential energy at its greatest

• 1
• 2
• 3
• 4

You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball?

• 900 J
• 1800 J
• 60 J
• 30 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the equation involving:
Gravitational potential energy, gravitational field strength, mass and height

• Gravitational field strength = mass x gravitaitional potential energy x height
• Mass = Gravitational potential energy x gravitational field strength x height
• Gravitational Potential Energy = mass x gravtitational field strength x height

What is the equation involving kinetic energy, mass and velocity?

• Kinetic energy -= mass x velocity
• Kinetic energy = 1/2 x mass x velocity²
• Kinetic energy = 1/2 x mass x velocity

If you buy a machine that has an efficiency of 82%, what happened to the other 18%?

• Most of the rest of the energy was dissipated to the surroundings as a thermal energy store
• There is not enough information given