a) A block is launched up a frictionless ramp, as shown, with initial speed v. T

Question

a) A block is launched up a frictionless ramp, as shown, with initial speed v. The block travels up the ramp and continues across the level section. i. Which forces, if any, do non-zero work on the block? i Which forces, if any, do zero work on the block? b) Suppose the block in part a is launched with the same initial speed v,on the following frictionless ramps. In each case, state whether the mognitude of the net work done on the block from the bottom to the top of the ramp is greater than, less than, or equal to the magnitude of the net work done on the block in part A. Explain your answer in caclh ease Case a i. The ramp is steeper (a>0) ii. The ramp has two sections of different slope. i The ramp has several sections of gradually iv The ramp is curved. increasing steepness. Case c Case d

Explanation / Answer

here,

b)

1)

as the ramp is frictional less

and the height achived is H

the work done against gravity is m*g*H

so, the work done is same

2)

as the ramp is frictional less

and the height achived is H

the work done against gravity is m*g*H

so, the work done is same

3)

as the ramp is frictional less

and the height achived is H

the work done against gravity is m*g*H

so, the work done is same

4)

as the ramp is frictional less

and the height achived is H

the work done against gravity is m*g*H

so, the work done is same

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