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23 Nov 2019

An 6.0 kg sled is initially at rest on ahorizontal road. Thecoefficient of kinetic friction between thesled and the road is0.40. The sled is pulled a distance of 3.0 mby a force of 37 Napplied to the sled atan angle of 30Â° to the horizontal.

(a) Find the work done by theappliedforce.
J

(b) Find the energy dissipated by friction.
J

(c) Find the change in the kinetic energy of the sled.
J

(d) Find the speed of the sled after it has traveled 3 m.
m/s

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Beverley SmithLv2

11 Jul 2019

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Related questions

An 8.0 kg sled is initially at rest on a horizontal road. The coefficient of kinetic friction between the sled and the road is 0.40. The sled is pulled a distance of 3.0 m by a force of 42 N applied to the sled at an angle of 30° to the horizontal.Find the work done by the applied force.Find the energy dissipated by friction.Find the change in the kinetic energy of the sled.Find the speed of the sled after it has traveled 3 m.

The kinetic energy

of an object of mass

moving at a speed

is defined as $K=(1/2)mv^2$ . It seems reasonable to say that the speed of an object--and, therefore, its kinetic energy--can be changed by performing work on the object. In this problem, we will explore the mathematical relationship between the work done on an object and the change in the kinetic energy of that object.

Let us now consider the situation quantitatively. Let the mass of the sled be and the magnitude of the net force acting on the sled be. The sled starts from rest.

Consider an interval of time during which the sled covers a distance

and the speed of the sled increases from

. We will use this information to find the relationship between the work done by the net force (otherwise known as the network) and the change in the kinetic energy of the sled.

Find the net force

acting on the sled.

Express your answer in terms of someor all of the variables

, and

Find the net work

done on the sled.

Express your answer in terms of someor all of the variables

is defined as $K=(1/2)mv^2$ . It seems reasonable to say that the speed of anobject--and, therefore, its kinetic energy--can be changed byperforming work on the object. In this problem, we willexplore the mathematical relationship between the work done on anobject and the change in the kinetic energy of that object.

Let us now consider the situationquantitatively. Let the mass of the sled be and the magnitude of the net force acting on the sled be. The sled starts from rest.

Consider an interval of time duringwhich the sled covers a distance

and the speed of the sled increases from

. We will use this information to find the relationshipbetween the work done by the net force (otherwise known as thenet work) and the change in the kinetic energy of thesled.

Find the net force

acting on the sled.

Express your answer in terms of someor all of the variables

, and

Find the net work

done on the sled.

Express your answer in terms of someor all of the variables

and

graywildebeest386

A sled of mass 'm' is being pulled horizontally by a constant horizontal force of magnitude F. The coefficient of kinetic friction is . During the time interval , the sled moves a distance 's', starting from rest.