1. A block of mass m is launched up a frictionless ramp with an initial speed v

Question

1. A block of mass m is launched up a frictionless ramp with an initial speed v and reaches a maximum vertical height h. A second block having twice the mass (2m) is launched up the same ramp with the same initial speed (v). What is the maximum vertical height reached by the second block?

Select one:

a. 4h

b. 2h

c. h

d. SQRT(2)*h

2.The work done by a conservative force depends on the path taken.

Select one:

True

False

3. Mechanical energy can be dissipated to nonmechanical forms of energy.

Select one:

True

False

Explanation / Answer

Hmax = V^2/2g

Height reached is independent of mass

so H2/H1 = v2^2/v1^2

H2 = v^2/v^2 = 1

H2 = 1 * H1 = h

so option C.

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2. W = Force* distance and

W = maS

since mass is doubled,

Work also doubled

Work Done by conservative force is independent of path

so False it is

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3. due to the law of conservation of Energy

one form of energy disappers another form of energy appears

so But not non mehanical forms

so false it is

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