Question 1 : A car sometimes overturns while taking a turn. When it overturns, it is
1. the outer wheel which leaves the ground first
2. the inner wheel which leaves the ground first
3. either inner wheel or the outer wheel leaves the ground
4. both the wheel leave the ground simultaneously
View Answer   Discuss with Members

Question 2 : A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?
1. 2 cm
2. 4 cm
3. 6 cm
4. 16 cm
View Answer   Discuss with Members

Question 3 : A car of mass 800 kg moves on a circular track of radius 40 m. If the coefficient of friction is 0.5, then maximum velocity with which the car can move is
1. 8 m/s
2. 7 m/s
3. 12 m/s
4. 14 m/s
View Answer   Discuss with Members

Question 4 : A car is moving on a circular path and takes a turn. If R1 and R2 are the reactions on the inner and outer wheels respectively, then
1. R1 > R2
2. R1 = R2
3. R1 = >R2
4. R1 < R2
View Answer   Discuss with Members

Question 5 : A car of mass 1000 kg moves on a circular road with a speed of 20 m/s. Its direction changes by 90° after traveling 628 m on the road. The centripetal force acting on the car is
1. 500 N
2. 1000 N
3. 1500 N
4. 2000 N
View Answer   Discuss with Members

Question 6 : A car is moving in horizontal circular track of radius 10 m, with a constant speed of 36 km/hour. A simple pendulum is suspended from the roof of the car. If the length of the simple pendulum is 1 m, what is the angle made by the string with the track?
1. 60°
2. 45°
3. 90°
4. 30°
View Answer   Discuss with Members

Question 7 : A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is
1. 9.8 m/s2
2. 1.8 m/2
3. 2 m/s2
4. 2.7 m/s2
View Answer   Discuss with Members

Question 8 : A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be
1. 10 sec
2. 1 sec
3. 4 sec
4. 8 sec
View Answer   Discuss with Members

Question 9 : A bucket containing water is tied to one end of a rope of length 2.5 m and rotated about the other end in a vertical circle. What should be the minimum velocity of the bucket at the highest point, so that the water in the bucket will not spill? (g = 10 m/s2)
1. 5 m/s
2. 4 m/s
3. 2.5 m/s
4. 7 m/s
View Answer   Discuss with Members

Question 10 : A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with a constant speed. What should be the minimum speed so that the water from the bucket does not spill when the bucket is at the highest position?
1. 4 m/sec.
2. 16 m/sec.
3. 6.25 m/sec.
4. None of these
View Answer   Discuss with Members