Worksheets3.6 Changes in energy [Mastery check]
Total questions: 8
Worksheet time: 5mins
Which of the following is true about the energy of skateboarder?
Her gravitational potential energy was converted into kinetic energy as she rode up the ramp.
Her kinetic energy has been used up as she rode up the ramp, leaving her with no mechanical energy.
Her kinetic energy was converted into gravitational potential as she rode up the ramp.
She started with no mechanical energy and gained gravitational potential energy as she rode up the ramp.
Pang is a professional weightlifter. On his third attempt, he lifts a 200 kg weight above his head.
Which of the following describe an energy transfer in this scenario?
Pang transfers chemical energy to the weight.
The weight transfers gravitational potential energy to Pang.
Pang transfers gravitational potential energy to the weight.
The weight transfers gravitational energy to the ground.
On a camping trip, Priya turns on a battery-powered flashlight for 20 minutes to get ready for bed, and then turns it off.
How does the energy of the flashlight and battery system compare before and after it has turned on and off?
The system's energy decreased because some energy was converted into light.
The systems energy increased because some energy was converted into light.
The system's energy did not change because some energy was converted into light.
Two roommates are sitting in their living room on a hot summer afternoon. One of them plugs a fan into a wall socket and turns it on.
Which for of energy are most involved in the operation of the fan?
chemical and electrical
thermal and kinetic
electrical and kinetic
As Erica swing from position A to B, the energy changes from gravitational potential to (a)
As Erica swing from B to C, the energy changes from kinetic to (a)
Which statement describes how Emilla's energy changes as she swings from point A to point B?
She gains kinetic energy and loses an equal amount of potential energy.
She gains potential energy and loses an equal amount of kinetic energy.
Her kinetic and potential energy don't change.
A white and a black pool ball with the same mass are at rest on a table. The white ball is hit and starts rolling towards the black ball. The two balls collide and begin rolling in the same direction.
What most likely happened during the collision between the balls?
The white ball transferred energy to the black ball.
The black ball transferred energy to the white ball.
The black and white balls gained nergy.
The black and white balls both lost energy.
