# Physics

posted by .

A hovercraft of mass 77.0 kg can move on a horizontal surface, the x-y plane. A single unbalanced force acts on the hovercraft, but the size of the force is unknown. The hovercraft initially has a velocity of 6.0 m/s in the positive x direction and some time later has a velocity of 9.0 m/s in the positive y direction. How much work is done on the hovercraft by the force during this time?

• Physics -

How long does the velocity change take? "Some time later" does not provide enough information.

You can get the force from the momentum change and the time interval.

• Physics (correction) -

On second thought, the work done equals the kinetic energy change. You can solve for that, no matter how long the velocity change takes. The direction changes don't matter in the result.

• Physics -

56

## Similar Questions

1. ### Physics

Two people are standing on a 2.2-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.1-kg ball to the other, who catches it. The ball travels nearly …
2. ### physics-6

Suppose a hovercraft undergoes constant uniform acceleration, which causes the hovercraft to move from rest to a speed of 30.8 m/s. How long does the hovercraft accelerate if it travels a distance of 493 m?
3. ### AP Physics

Hi, I have the follwoing physics question to ask, Plesae help with hints. "Two people are standing on a 2.5-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person …
4. ### Physics

A 25 kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. What speed does that mass have after being moved 2.0m?
5. ### Physics

A 25 kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. What speed does that mass have after being moved 2.0m?
6. ### Physics

A hovercraft of mass 69.0 kg can move on a horizontal surface, the x-y plane. A single unbalanced force acts on the hovercraft, but the size of the force is unknown. The hovercraft initially has a velocity of 5.0 m/s in the positive …
7. ### Physics

A hovercraft of mass 77.0 kg can move on a horizontal surface, the x-y plane. A single unbalanced force acts on the hovercraft, but the size of the force is unknown. The hovercraft initially has a velocity of 6.0 m/s in the positive …
8. ### Physics

How do I make calculations for a toy hovercraft?
9. ### Physics

How do I make calculations for a toy hovercraft?
10. ### AP Physics

Two people are standing on a 2.2-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.0-kg ball to the other, who catches it. The ball travels nearly …

More Similar Questions