Home
Class 11
PHYSICS
Two blocks A and B having masses m(1)=1 ...

Two blocks A and B having masses `m_(1)=1 kg m_(2)=4 kg` are arranged as shown in the figure The pulleys P and Q are light and frictionless. All the blocks are resting on a horizontal floor and the pulleys are held such that strings remains just taut. At moment t=0 a force F=30 t (N) starts acting on the pulley P along vertically upward direction as shown in the figure The time when the blocks A and B loose contact with ground is `4//x` sec then x is:

Text Solution

Verified by Experts

The correct Answer is:
2
Concept: When blocks loose contact with ground normal reaction on then becomes zero.

(i) When A looses contact
`T=10N , F=30t or 30t =30, t =1sec`
When B looses contact
`2T=40or T=20 , F=3T`
or `30t=60 or t=2 sec`
Promotional Banner

Topper's Solved these Questions

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Comprehension|12 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Matrix match|7 Videos

  • BASIC MATHEMATICS

    GRB PUBLICATION|Exercise Problems For Practice|35 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Comprehension type|11 Videos

Similar Questions

Explore conceptually related problems

Two block a and B having masses m_(1)=1 kg, m_(2)=4 kg are arranged as shown in the figure. The pulleys P and Q are light, and frictionless. All the blocks are resting on. a horizontal floor and the pulleys ate held such that strings remains just taut. At.moment t=0 a force F=30t (N) starts acting on thei ipulley p along . vertically upward direction as shown in the pulley P along vertically upward direction as shown in the figure. Calculate. (i) the time when the blocks A and B loose contact with ground. (ii) the. velocity of A when B looses contact with ground. (iii) the height raised. by A upto this instant. (iv) the work done by the force F upto this instan.

Two block A and B of masses 1kg and 2kg respectively are connected by a string, passing over a light frictionless pulley B as shown. Another string connect the center of pulley. Both the blocks are resting on a horizontal floor and the pulley is help such that string remains just taut. At moment t = 0 , a force F = 20 t starts acting on the pully along vertically upwards direction as shown in figure.Calculate (a) velicity of A when B loses contact with the floor. (b) height raised by the pulley upto that instant. (Take = g =10 m//s^(2))

Two blocks, each having a mass M, rest on frictionless surfaces as shown in the figure. If the pulleys are light and frictionless and M on the incline is allowed to move down, then the tension in string will be

Find the acceleration of two masses as shown in figure . The pulley are light and frictionless and string are light and frictionless and string are light and inextensible.

Two blocks A and B are arranged as shown in figure.The pulleys are light and frictionless.The strings are light and inextensible.If the acceleration of the block B is 3m/s^(2) ,then the acceleration of the block A is __________ m/s^(2)

Three blocks of masses m_1, m_2 and m_3 are connected as shown in the figure. All the surfaces are frictionless and the string and the pulleys are light. Find the acceleration of m_1

Two blocks of masses 3 kg and 6 kg are connected by a string as shown in the figure over a frictionless pulley. The acceleration of the system is

In the arrangement , shown below pulleys are massless and frictionless and threads are inextensible , block of mass m_(1) will remain at rest if