# Physics - drwls?

posted by .

A 2000 kg truck traveling north at 38 km/hr turns east and accelerates to 55 km/hr. What is the change in the truck's kinetic energy? What is the magnitude of the change in the linear momentum of the truck? What is the direction of the change in linear momentum of the truck? (give an angle, measured from east)

Convert the speeds to m/s and use (1/2) MV^2 for the kinetic energy. Momentum is MV, but is a vector so you must account for direction changes when calculating momentum change.

You need to learn the basic concepts and try applying them yourself. We will be happy to check your work.

I'm trying to do a similar problem for: 'What is the magnitude of the change in the linear momentum of the truck?'

Can you calculate it by just subtracting the initial momentum from the final momentum? ie
Change in momentum =
M x V(final) - M x V(initial)
Using this approach I can't get the right answer but I don't know any other way to do it.

• Physics - drwls? -

by 110,000-76000 we get the answer 34000

## Similar Questions

1. ### Physics - drwls

Posted by winterWX on Monday, March 19, 2007 at 11:51pm. A 2600 kg truck traveling north at 38 km/hr turns east and accelerates to 55 km/hr. What is the change in the truck's kinetic energy?
2. ### Physics

Consider a perfectly inelastic head-on collision between a small car and a large truck traveling at the same speed. Which vehicle has a greater change in kinetic energy as a result of the collision?
3. ### physics

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.5 m/s squared. At the same instant, a car passes the truck going 15 m/s. Where and when does the truck catch up with the car?
4. ### Physics

A car and a large truck traveling at the same speed collide head-on and stick together. Which vehicle experiences the larger change in the magnitude of its momentum?
5. ### Physics

A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.0 m/s2. At the same instant, a car passes the truck going 13 m/s. Where and when does the truck catch up with the car?
6. ### Physics

A blue car with mass mc = 410.0 kg is moving east with a speed of vc = 23.0 m/s and collides with a purple truck with mass mt = 1248.0 kg that is moving south with a speed of vt = 10.0 m/s . The two collide and lock together after …
7. ### physics

a truck with a mass of 2100 kg travels at a constant speed of 75 km/h. (a) What is the magnitude of the truck’s linear momentum?
8. ### Physics-Kinetic Energy

Can someone help me solve this kinetic energy problem?
9. ### physics

A construction worker riding in the tray of a truck traveling at 10 m/s, sees one of his friends passing and decides to jump off the truck. The magnitude of his initial speed of jumping is: (a) zero (b) Less than the truck's (c) Equal …
10. ### physics

1) What average power is required for a runner with a mass of 85 kg to reach a speed of 8 m/s from a stationary start during a time of 2 s?

More Similar Questions