ISRO Mechanical Engg.: Engineering Mechanics Booster Quiz 2

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Question 1

Four forces of magnitudes 20 N, 40 N, 60 N and 80 N are acting respectively along the four sides of a square ABCD as shown in figure. The magnitude of resultant is

• A40√2 N
• B50√2 N
• C45√2 N
• D60√2 N

Question 2

When a jet plane flying at 300 m/s is at the very top of its trajectory, the apparent weight of a passenger is one half of her actual weight. Find the radius of curvature R of the flight path at this point. Use g = 10 m/s²

• A22 km
• B18 km
• C30 km
• D16 km

Question 3

If two bodies one light and other heavy have equal kinetic energies, which one has a greater momentum

• AHeavy body
• BLight body
• CBoth have equal momentum
• DIt depends on the actual velocities

Question 4

A person walks up a stalled escalator in 90 seconds. When standing on the same escalator, now moving, he is carried up in 60 seconds. How much time would it take him to walk up the moving escalator?

• A30 sec
• B36 sec
• C45 sec
• D54 sec

Question 5

A block is made to slide down an inclined plane (30 ° with horizontal) which is smooth. It starts sliding from rest and takes a time t to reach the bottom of the plane. An identical body is freely dropped from the same point. The time the body takes to reach the bottom is

• At
• Bt/2
• Ct/3
• Dt/4

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