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# BARC 2020:Engineering Mechanic Nuclear Quiz 2

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Question 1

A force F has magnitude of 15 N. Direction of F is at 37° from negative x-axis towards positive y-axis. Represent F in terms of and?

Question 2

A block of weight 5 N is pushed against a vertical wall by a force 12 N. The coefficienet of friction between the wall and block is 0.6. The magnitude of the force exerted by the wall on the block is

Question 3

A block of mass m placed on a horizontal surface is being pushed by a force F making an angle θ with vertical. If the coefficient of friction is μ, how much force is needed to get the block just started(tanθ > μ)

Question 4

Horizontal range of a particle in projectile motion is

Question 5

A turn table is rotating at a rate of 50rpm. A small block of mass 2.5kg is kept at a radius r. The coefficient of friction between the block and the table is 0.25. What is the minimum radius at which if kept the block will just overcome the frictional resistance.

Question 6

A boy kicks a football such that it acquires a velocity of 10m/s at an angle of 45 with the ground. If the goal is 15m away from the boy’s location, by how much distance did he miss his goal?

(take g=10 m/s2)

Question 7

A block of mass ‘m’ slides down a smooth vertical circular track. During the motion, the block is in

Question 8

A mass m1 with velocity vimpacts with a mass mat rest. After the impact if the mass m1 comes to rest, then the coefficient of restitution ‘e’ should be __________?

Question 9

A ball was thrown vertically downwards with an initial velocity of 20m/s from a height of 1.8 m. The ball rebounds from the floor. If e = 0.7, the ball will hit the ceiling at a height of 3.5m with a velocity of;

Question 10

Determine the tension T2 in the strings as shown in figure.

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