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SSC JE 2019-20: Law of motion -2
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Question 1
Find the effort required by a crow bar to move the load of 650N?
Question 2
A balance carries pile of bricks whose net force acting downward will be 10 N force which acts at 1 ·5 m from the pivot point. Find the force needed on opposite side of the balance at a distance of 0 ·75m from the pivot point.
Question 3
A body of mass 5 kg has the displacement as function of time: x = 0.75t3 – 4.5t2 + 12t ; (t = time in seconds, x = in meters). Calculate the displacement of the body at the instant when, acceleration of the body is zero.
Question 4
A particle is moving such that s = t3 – 6t2 + 18t + 9, where s is in metres and t is in second. The minimum velocity attained by the particle is
Question 5
The tension in the cable supporting a lift moving upwards is twice the tension when the lift moves downwards. What is the acceleration of the lift?
Question 6
The midpoint of a rigid link of a mechanism moves as a translation along a straight line, from rest, with a constant acceleration of 5 m/s2. The distance covered by the said midpoint in 5 s of motion is
Question 7
According to Newton’s first law of motion, the body acted upon by a coplanar system of forces is said to be in equilibrium when
Question 8
What is the distance ( in m ) traveled by car in 5 seconds if it is traveling at 36 kmph and is accelerated at the rate of 6 m/s2.?
Question 9
Two block of weight 50 N and 30 N respectively are connected by a light string passing over a smooth friction less pulley. The acceleration with which the weights move ?
Question 10
The forces, which meet at one point, but their lines of action do not lie in a plane, are called:
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