# Physics

How much work is done by the force F⃗ =(− 3.0 i^− 7.6 j^)N on a particle that moves through displacement Δr⃗ = 3.6 i^−2.0j^m?

1. 👍 0
2. 👎 0
3. 👁 902
1. Fx dx + Fy dy

(-3 * 3.6) - (7.6 * -2)

4.4

1. 👍 0
2. 👎 0
posted by Damon
2. F=<-3,-7.6>
Δr = <3.6,-2>

Work done
F.Δr
= <-3,-7.6><3.6,-2>
= 4.4 J

1. 👍 0
2. 👎 0
posted by MathMate

## Similar Questions

1. ### Physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 14

asked by Anonymous on November 18, 2009
2. ### 11th garde physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 17

asked by Luricela on February 13, 2010
3. ### physics

because of friction, a constant force of 20 N is needed to slide a box across a room to the right at a constant speed, and box is moved 3 m. What is the friction force and how much work is done by friction force?? How much work is

asked by mitch on October 1, 2006
4. ### Physics

Alright, I can't figure it out, here's the problem. 3. A boy is giving his little sister a ride in the wagon. He pulls with an applied force of 20N. The frictional force against him is 20N and the sled is traveling 2m/s. If the

asked by Ashtin on January 28, 2016
5. ### Physics

The two ropes shown in the bird's-eye view of (Figure 1) are used to drag a crate 3.7 m across the floor. How much work is done by the force fk→? How much work is done by the force T1→? How much work is done by the force

asked by Tommy on July 22, 2015
1. ### Physics

Sally applies a horizontal force of 500 N with a rope to dtag a wooden crate across a floor with a constant speed. The rope tied to the crate is pulled at an angle of 67.5 degrees. a) How much force is exerted by the rope on the

asked by Elizabeth on November 14, 2007
2. ### physics

Which of the following statements about work is or are true? (More than one statement may be true.) A. Negative net work done on an object always reduces the object's kinetic energy. B. If the work done on an object by a force is

asked by andrea on February 22, 2011
3. ### Physics

A 54 kg box is being pushed a distance of 7.0 m across the floor by a force P whose magnitude is 153 N. The force P is parallel to the displacement of the box. The coefficient of kinetic friction is 0.25. Determine the work done

asked by Brandon on October 13, 2008

A crate is dragged 5.0 along a rough floor with a constant velocity by a worker applying a force of 125N to a rope at an angle of 30degrees to the horizontal. Calculate the work done by the tension in the rope, the force of

asked by K on December 5, 2013
5. ### Physics

A force of 3.00N acts through a distance of 12m in the direction of the force.Find the work done. work= force *distance If force is in newtons, distance in meters, the work unit is in joules.

asked by fluffy on September 13, 2006
6. ### physics

A block of mass 2.50 kg is pushed 2.80 m along a frictionless horizontal table by a constant 12.0 N force directed 25.0° below the horizontal. (a) Determine the work done by the applied force. J (b) Determine the work done by the

asked by monic on October 12, 2012

More Similar Questions