Cengage JEE Mains Physics by B.M Sharma
A body travels 200 cm in the first two seconds and 220 cm in the next 4 s with deceleration. The velocity of the body at the end of the 7 s is
05
Sep
A body travels 200 cm in the first two seconds and 220 cm in the next 4 s with deceleration. The velocity of the body at the end of the 7 s is A body travels 200 cm in the first two seconds and 220 cm in the next 4 s with deceleration. The velocity [...]
A stone is dropped from a certain height which can reach the ground in 5 s. It is stopped after 3 s of its fall and then it is again released. The total time taken by the stone to reach the ground will be.
05
Sep
A stone is dropped from a certain height which can reach the ground in 5 s. It is stopped after 3 s of its fall and then it is again released. The total time taken by the stone to reach the ground will be. A body is released from the top of a tower of [...]
The displacement x of a particle moving in one dimension under the action of a constant force is related to time t by the equation t = root x + 3, where x is in meter and t is in second. Find the displacement of the particle when its velocity is zero.
05
Sep
The displacement x of a particle moving in one dimension under the action of a constant force is related to time t by the equation t = root x + 3, where x is in meter and t is in second. Find the displacement of the particle when its velocity is zero. The displacement x [...]
A body dropped from the top of a tower covers a distance 7x in the last second of its journey, where x is the distance covered in first second. How much time does it takes to reach the ground?
05
Sep
A body dropped from the top of a tower covers a distance 7x in the last second of its journey, where x is the distance covered in first second. How much time does it takes to reach the ground? A body dropped from the top of a tower covers a distance 7x in the last [...]
A train 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s. The time taken by the first train to pass the second train completely is:
05
Sep
A train 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s. The time taken by the first train to pass the second train completely is: A train 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s. The [...]
A stone is dropped from the top of a tower of height h. After 1 s another stone is dropped from the balcony 20 m below the top. Both reach the bottom simultaneously. What is the value of h? Take g = 10 ms^−2
05
Sep
A stone is dropped from the top of a tower of height h. After 1 s another stone is dropped from the balcony 20 m below the top. Both reach the bottom simultaneously. What is the value of h? Take g = 10 ms^−2 A body is released from the top of a tower of [...]
A body is released from the top of a tower of height H m. After 2 s it is stopped and then instantaneously released. What will be its height after next 2 s ?
05
Sep
A body is released from the top of a tower of height H m. After 2 s it is stopped and then instantaneously released. What will be its height after next 2 s ? A body is released from the top of a tower of height H m. After 2 s it is stopped and [...]
A thief is running away on a straight road in a jeep moving with a speed of 9 ms^−1. A policeman chases him on a motor cycle moving at a speed of 10 ms^−1. If the instantaneous separation of the jeep and the motor cycle is 100 m, how long will it take for the policeman catch the thief?
05
Sep
A thief is running away on a straight road in a jeep moving with a speed of 9 ms^−1. A policeman chases him on a motor cycle moving at a speed of 10 ms^−1. If the instantaneous separation of the jeep and the motor cycle is 100 m, how long will it take for the [...]
The velocity acquired by a body moving with uniform acceleration is 30 m/s in 2 s and 60 m/s in 4 s. The initial velocity is:
05
Sep
The velocity acquired by a body moving with uniform acceleration is 30 m/s in 2 s and 60 m/s in 4 s. The initial velocity is: The velocity acquired by a body moving with uniform acceleration is 30 m/s in 2 s and 60 m/s in 4 s. The initial velocity is: September 5, 2020 [...]
Between the two stations, a train accelerates from rest uniformly at first, then moves with constant velocity and finally retards uniformly to come to rest. If the ratio of the time taken is 1 : 8 : 1 and the maximum speed attained be 60 km/h, then what is the average speed over the whole journey ?
05
Sep
Between the two stations, a train accelerates from rest uniformly at first, then moves with constant velocity and finally retards uniformly to come to rest. If the ratio of the time taken is 1 : 8 : 1 and the maximum speed attained be 60 km/h, then what is the average speed over the whole [...]
Tags:
a train accelerates from rest uniformly at first ,
Between the two stations ,
then moves with constant velocity and finally retards uniformly to come to rest. If the ratio of the time taken is 1 : 8 : 1 and the maximum speed attained be 60 km/h ,
then what is the average speed over the whole journey ? ,