Physics
Chapter No 3
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#17 A wooden block of mass 1.0kg is on rough horizantal surface. A force 12N is applied on block horizantally and it accelerates at 4.0m/sec2, the magnitude of fractional force is
A) 4N
B) 12N
C) 8N
D) 10N
#18 A body initially at rest exploded into two masses m1 and m2 that move a part with speed 'v1' and 'v2' respectively what is the ratio v1/v2=?
A) m1/m2
B) m2/m1
C) (m1/m2)1/2
D) (m2/m1)1/2
#19 Two equal masses travel toward each other with speed 60cm/sec and 40cm/sec they stick together on impact,what is the speed of masses after impact
A) 10cm/sec
B) 20cm/sec
C) 40cm/sec
D) 50cm/sec
#20 Kinematic is the branch of the mechanics which deals with
A) Rest
B) Rest and motion
C) motion and cause
D) motion without cause
#21 The average and instantaneous velocities of a body will be same if the body moves with
A) Average velocity
B) Constant velocity
C) Constant acceleration
D) None of these
#22 A ball relcased from certain height travels 10m in 1.0sec) The distance traveled by ball after 10 seconds will be
A) 100m
B) 98m
C) 49m
D) 490m
#23 The horizantal and veritcal accelerations of an object projected with velocity Vi in gravitational field respectively are
A) 0m/s2 , 0m/s2
B) 0m/s2 , 9.8m/s2
C) 9.8m/s2 , 0m/s2
D) 9.8m/s2 , 9.8m/s2
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