Download the App!

Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.

Get the answer to your homework problem.

Try Numerade free for 7 days

Like

Report

The skateboarder in the drawing starts down the left side of the ramp with an initial speed of 5.4 m/s.Neglect non conservative forces, such as friction and air resistance, and find the height h of the highest point reached by the skateboarder on the right side of the ramp.

1.5$m$

Physics 101 Mechanics

Chapter 6

Work and Energy

Work

Kinetic Energy

Sabbir Hossain S.

July 16, 2021

On Earth a block has a weight of 88 N. This block is sliding on a horizontal surface on the moon, where the acceleration due to gravity is 1.60 m/s2 . As Figure shows, the block is being pulled by a horizontal rope in which the tension is T = 24 N. The co

Cornell University

Simon Fraser University

University of Sheffield

Lectures

03:47

In physics, the kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. The kinetic energy of a rotating object is the sum of the kinetic energies of the object's parts.

02:08

In physics, work is the transfer of energy by a force acting through a distance. The "work" of a force F on an object that it pushes is defined as the product of the force and the distance through which it moves the object. For example, if a force of 10 newtons (N) acts through a distance of 2 meters (m), then doing 10 joules (J) of work on that object requires exerting a force of 10 N for 2 m. Work is a scalar quantity, meaning that it can be described by a single number-for example, if a force of 3 newtons acts through a distance of 2 meters, then the work done is 6 joules. Work is due to a force acting on a point that is stationary-that is, a point where the force is applied does not move. By Newton's third law, the force of the reaction is equal and opposite to the force of the action, so the point where the force is applied does work on the person applying the force. In the example above, the force of the person pushing the block is 3 N. The force of the block on the person is also 3 N. The difference between the two forces is the work done on the block by the person, which can be calculated as the force of the block times the distance through which it moves, or 3 N × 2 m = 6 J.

03:27

The skateboarder in the dr…

02:49

Go The skateboarder in the…

02:50

02:40

The drawing shows a skateb…

01:14

A student is skateboarding…

04:16

02:28

A skateboarder shoots off …

04:48

02:47

since there are no non conservative forces. Therefore, if we say that the initial kinetic energy is K subscript zero and the initial potential energy is P e subscript zero and then the final kinetic energy would be K F and the final potential energy would be PF. So we can take the initial potential energy to be equal to zero, cause that's the reference point. And when he reaches the highest point, the skateboarder would be momentarily at wrestling. Finally connect where kinetic energy will also be zero. So now since ah que suck trip zero plus p e sub stripped zero equals K Final plus p e final. And we already said that piece he sub zero is zero and also k sub f zero. So we can now put some numbers in 1/2 times M times V squared is equal to M G H and we can cross out the M on both sides. We don't since you can divide both sides by m and now each would be equal to. So let's make it a tch. The subject that would be V squared over to Ji. So now let's all for each obvious 5.4 squared, divided by two times 9.8, and that gives me ages equal to 1.49 meter.

View More Answers From This Book

Find Another Textbook

Numerade Educator

11:08

A block is pressed against a vertical wall by a force $\overrightarrow{\math…

08:33

A $4.00-\mathrm{g}$ bullet is moving horizontally with a velocity of $+355 \…

02:27

The concepts in this problem are similar to those in Multiple-Concept Exampl…

03:30

Two cars are traveling at the same speed of 27 m/s on a curve that has a rad…

01:33

One end of a wire is attached to a ceiling, and a solid brass ball is tied t…

07:20

A damp washcloth is hung over the edge of a table to dry. Thus, part (mass $…

03:22

A rotational axis is directed perpendicular to the plane of a square and is …

03:53

When chasing a hare along a flat stretch of ground, a greyhound leaps into t…

02:15

A child is twirling a 0.0120-kg plastic ball on a string in a horizontal cir…

03:24

In preparation for shooting a ball in a pinball machine, a spring $(k=675 \m…