Conservation of energy on ramps, swings and coasters
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A toy coaster cart starts at rest with 60 J of gravitational energy. With no friction, at a lower point it has 25 J left. How much kinetic energy does it have there, Ari?
A toy coaster cart starts at rest with 80 J of gravitational energy. With no friction, at a lower point it has 30 J left. How much kinetic energy does it have there, Bo?
A toy coaster cart starts at rest with 45 J of gravitational energy. With no friction, at a lower point it has 12 J left. How much kinetic energy does it have there, Esme?
In the energy bar chart, what is the cart's kinetic energy at point C, Kira?
- 0 J, since it is at the bottom
- 14.7 J
- 24.5 J
In the energy bar chart, what happens to the cart's total energy from A to C, Luz?
Use the picture in question 4.
- It falls as the cart drops
- It grows as the cart speeds up
- It stays 24.5 J
A pendulum bob swings back and forth with no friction. Where is it moving fastest, Milo?
- At the highest points
- Halfway up, between the two
- At the lowest point
Where does a swinging pendulum bob stop for an instant, Noah?
- At the lowest point
- Nowhere, since it keeps swinging
- At each highest point
With no friction, what stays the same as a cart rolls down a ramp, Ren?
- The kinetic energy
- The cart's speed, since the ramp is smooth
- Kinetic plus gravitational energy
With no friction, what happens to a cart's gravitational energy as it rolls down a ramp, Tala?
- It is used up
- It stays the same
- It turns into kinetic energy
A ramp has friction. What happens to a cart's total mechanical energy as it rolls down, Zee?
- It falls, as some becomes thermal energy
- It stays the same
- It is destroyed by friction