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Engineering-mechanics Questions Set 24:

Quiz Mode

What is the maximum efficiency of a lifting machine?

m/V.R.

1/(m x V.R.)

1/m

V.R./m

Solution:

For a self-locking machine, what is the efficiency?

more than 50%

less than 50%

50%

100%

Solution:

The coefficient of restitution for inelastic collisions is

between 0 and 1

more than 1

Solution:

What does the area under the force-displacement diagram represent?

Impulse

Momentum

Power

Work done

Solution:

What type of path results in zero tangential acceleration for a moving body with uniform velocity?

Oval path

Circular path

Elliptical path

Axial path

Solution:

If a ball is thrown at a velocity of 25 m/s at an angle of 50° with the horizontal, then what is the minimum velocity attained by it?

14.86 m/s

14.01 m/s

15.97 m/s

16.07 m/s

Solution:

A lifting machine lifts a load of 1000N through a distance of 0.2 m using an effort of 200N through a distance of 1 m. Find the efficiency of the machine in %.

100%

80%

90%

90.98%

Solution:

A lifting machine lifts a load of 2000 N through a distance of 0.4 m using an effort of 400 N through a distance of 4 m. What is the efficiency of the lifting machine?

50%

100%

75%

95%

Solution:

Which of the following is/are limitations of string law?

It is valid only when more than three particles are connected by a single string.

The direction of motion cannot be specified.

Both option 1 and option 2.

None of these.

Solution:

If x₁(t) and x₂(t) are solutions of the simple harmonic oscillator equation, consider the following statements:

x₁(t) + x₂(t) is also a solution of the same simple harmonic oscillator equation

ax₁(t) + bx₂(t) is also a solution of the same simple harmonic oscillator equation

There are no other solutions except x₁(t) and x₂(t)

Which of the following options is correct?

1 only

2 only

3 only

1 and 2

Engineering-mechanics Questions Set 24:

What is the maximum efficiency of a lifting machine?

Solution:

For a self-locking machine, what is the efficiency?

Solution:

The coefficient of restitution for inelastic collisions is

Solution:

What does the area under the force-displacement diagram represent?

Solution:

What type of path results in zero tangential acceleration for a moving body with uniform velocity?

Solution:

If a ball is thrown at a velocity of 25 m/s at an angle of 50° with the horizontal, then what is the minimum velocity attained by it?

Solution:

A lifting machine lifts a load of 1000N through a distance of 0.2 m using an effort of 200N through a distance of 1 m. Find the efficiency of the machine in %.

Solution:

A lifting machine lifts a load of 2000 N through a distance of 0.4 m using an effort of 400 N through a distance of 4 m. What is the efficiency of the lifting machine?

Solution:

Which of the following is/are limitations of string law?

Solution:

Solution:

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