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Free Online Mock Physics Multiple Choice Test on Laws motion
Sub Category : Laws motion Test : 9 Time Left :
1) A body of mass 2 kg is at rest on a horizontal table. The coefficient of friction between the body and the table is 0.3. A force of 5 N is applied on the body. The acceleration of the body is, the force of friction is(1) 5 N (2) 5.88 N (3) 6 N (4) 20 N
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2) A truck moving at 250/9 m s-1 carries a steel girder which rests on its wooden floor. The minimum time in which the truck can come to a stop without the girder moving forward is: Given: micro sings = 0.5(1) 3 s (2) 4 s (3) 5 s (4) 5.7 s.
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3) A box of mass m kg is placed on the rear side of an open truck accelerating at 4 m s-2. The coefficient of friction between the box and the surface below it is 0.4. The net acceleration of the box with respect to the truck is zero. The value of m is [Given: g = 10 m s-2](1) 4 kg (2) 8 kg (3) 9.78 kg. (4) It could be any value.
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4) A weight W rests an a rough horizontal plane. If the angle of friction be theta, the least force that will move the body along the plane will be(1) W cos theta (2) W cot theta (3) W tan theta (4) W sin theta
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5) A stone is acceleration upwards by a cord whose breaking strength is three times the weight of the stone. The maximum acceleration with which the stone can be moved up without breaking the cord is(1) g (2) 2 g (3) 3 g (4) 4 g
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