| Quiz | Work done |
|---|---|
| Name | |
| Result | PASSED |
| Score | 8 / 9 (88.9%) |
| Passing score | 7.2 |
| Quiz took | 7 min 12 sec |
| Quiz finished at | 2024-01-08 16:09:35 |
It takes 100 N to bring a shopping cart to rest, over a distance of 5 m. Calculate the work done in bringing the shopping cart to a stop.
It takes 3000 N to bring a car to rest, over a distance of 60 m. Calculate the work done in bringing the car to a stop.
It takes 2000 N accelerate a car from rest, over a distance of 20 m. Calculate the work done in accelerating the car.
It takes 20 N accelerate a skateboard from rest, over a distance of 150 cm. Calculate the work done in accelerating the skateboard.
200 kJ of energy is required to decelerate a car, over a distance of 50 m. Calculate the force applied by the brakes of the car.
8 kJ of energy is required to decelerate a truck, over a distance of 40 cm. Calculate the force applied to the truck to bring it to rest.
A force of 60 N is applied to a shopping cart in order to bring it to rest. The work done is 0.3 kJ. Calculate the distance traveled by the shopping cart, before it comes to rest.
A crane lifts an object with a mass of 200 kg, from the ground to a vertical distance of 30 m. Assuming that the work done is the same as the change in the gravitational potential energy store, calculate the force applied by the crane to lift the object. (Assume g = 9.8 N/kg)
The total mass of a lift and the people inside it is 1500 kg. The lift ascends from ground level, to a height of 50 m. Assuming that the work done is the same as the change in the gravitational potential energy store, calculate the force applied by the lift's motor. (Assume g = 9.8 N/kg)