# Physics

A 32.0kg crate is initially moving with a velocity that has magnitude 3.92m/s in a direction 37.0 ∘ west of north.How much work must be done on the crate to change its velocity to 5.50m/s in a direction 63.0 ∘ south of east?

1. 👍 0
2. 👎 0
3. 👁 373
1. You are given an initial KEnergy, a final KE, and looking for the added energy.

Notice it does not depend on direction, or time.

1/2 m 3.92^2+work=1/2 m 5.5^2
solve for work. mass m is given.

1. 👍 0
2. 👎 0
2. 238

1. 👍 0
2. 👎 0
posted by joan

## Similar Questions

1. ### physics

A 40.0 kg crate is initially moving with a velocity that has magnitude 4.09 m/s in a direction 37.0 ^\circ west of north. How much work must be done on the crate to change its velocity to 5.49 m/s in a direction 63.0 ^\circ south

asked by Colton on February 19, 2012
2. ### Physics

Two ice skaters, Daniel (mass 70.0kg ) and Rebecca (mass 45.0kg ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, who is moving at 14.0m/s before she collides with him. After the

asked by Andrew on October 17, 2013
3. ### physics

a 20 kg crate is initially moving down a wall at a speed of 2.0 m/s. Determine the magnitude of the average force exerted by the person in order to stop the crate's downward motion in a distance of .50 m. The person pushes in a

asked by brit on January 8, 2012
4. ### PHYSICs

The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces are applied to the crate, and it begins to move. The coefficient of kinetic friction between

asked by Tiffany on February 2, 2011
5. ### physics

The drawing shows a 20.1-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, and , are applied to the crate, and it begins to move.The coefficient of kinetic friction

asked by Anonymous on October 4, 2010
6. ### physics

The drawing shows a 25.1-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, 1 and 2, are applied to the crate, and it begins to move. The coefficient of kinetic friction

7. ### Physics

drawing shows a 25.0-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, and , are applied to the crate, and it begins to move. The coefficient of kinetic friction

asked by Litany on November 13, 2009
8. ### Physics

Find the position and velocity of a particle at t=1.94 s if the particle is initially moving east at a speed of 19.8 m/s and experiences an acceleration of magnitude 4.08 m/s^2, directed west. Magnitude and direction of the

asked by Christopher on January 16, 2011
9. ### Physics

A proton, moving with a velocity of vi, collides elastically with another proton that is initially at rest. Assuming that after the collision the speed of the initially moving proton is 2.90 times the speed of the proton initially

asked by PersonWhoNeedsHelp on November 8, 2015
10. ### physics

The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two forces, F1=88N and F2=54N, are applied to the crate, and it begins to move. The angle is 55 degrees.

asked by Tiffany on February 3, 2011

More Similar Questions