consider a situation where you exert a force f on a crate of mass m moving it at a speed v a dis

Name: consider a situation where you exert a force f on a crate of mass m moving it at a speed v a distance d across a floor in a time interval t the quantity 12 mv2 is 89423
Uploaded: 2021-01-30T22:38:57-08:00
Duration: 1 min 48 s
Channel: Lizandra Chagas
Description: consider a situation where you exert a force f on a crate of mass m moving it at a speed v a distance d across a floor in a time interval t the quantity 12 mv2 is 89423

Step 1: Identify the quantity ( frac{1}{2} mv^2 ). This expression represents the kinetic ene

Consider a situation where you exert a force f on a crate of...

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A net horizontal force $F$ is applied to a box with mass $M$ that is on a horizontal, frictionless surface. The box is initially at rest and then moves in the direction of the force. After the box has moved a dis- tance $D,$ the work that the constant force has done on it is $W_{D}$ and the speed of the box is $V$. The equation $P=F v$ tells us that the instanta neous rate at which $F$ is doing work on the box depends on the speed of the box. (a) At the point in the motion of the box where the force has done half the total work, and so has done work $W_{D} / 2$ on the box that started from rest, in terms of $V$ what is the speed of the box? Is the speed at this point less than, equal to, or greater than half the final speed? (b) When the box has reached half its final speed, so its speed is $V / 2,$ how much work has been done on the box? Express your answer in terms of $W_{D}$. Is the amount of work done to produce this speed less than, equal to, or greater than half the work $W_{D}$ done for the full displacement $D ?$

A net horizontal force $\boldsymbol{F}$ is applied to a box with mass $M$ that is on a horizontal, frictionless surface. The box is initially at rest and then moves in the direction of the force. After the box has moved a distance $D$, the work that the constant force has done on it is $W_{D}$ and the speed of the box is $V$. The equation $P=F v$ tells us that the instantaneous rate at which $\overrightarrow{\boldsymbol{F}}$ is doing work on the box depends on the speed of the box. (a) At the point in the motion of the box where the force has done half the total work, and so has done work $W_{D} / 2$ on the box that started from rest, in terms of $V$ what is the speed of the box? Is the speed at this point less than, equal to, or greater than half the final speed? (b) When the box has reached half its final speed, so its speed is $V / 2$, how much work has been done on the box? Express your answer in terms of $W_{D}$. Is the amount of work done to produce this speed less than, equal to, or greater than half the work $W_{D}$ done for the full displacement $D ?$

University Physics with Modern Physics In SI Units

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You exert a force of a known magnitude F on a grocery cart of total mass m. The force you exert on the cart points at an angle below the horizontal. Part A: If the cart starts at rest, determine an expression for the speed of the cart after it travels a distance d. Ignore friction. Express your answer in terms of the variables F, m, d, and θ.

Prabhu R.

Transcript

00:01 Hello guys! here we have a situation where the bot starts from rest and then moves due to a net force.

00:11 The total displacement is d.

00:16 First, we are going to calculate the velocity when we have half of the total work.

00:23 We can do it using kinetic energy.

00:27 The work of the net force is equal to the variation of the work.

00:32 The kinetic energy.

00:34 In the beginning it's zero, so when the work reaches half of the total, the kinetic energy is also half of the total.

00:45 So let's compare...

Question

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The quantity 1/2 mv2 is

Question

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The quantity 1/2 mv2 is

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