Sahay Sir > Question Answers > When a body is thrown up in a lift with a velocity u relative to the lift
Two blocks of mass 10kg and 30kg are kept as shown in the figure. The surface between the block is fricitional while the ground is smooth. A horizontal force of magnitude 60N is applied horizontally on the upper block. Find the frictional force on block of mass 30kg ?
22
Aug
Two blocks of mass 10kg and 30kg are kept as shown in the figure. The surface between the block is fricitional while the ground is smooth. A horizontal force of magnitude 60N is applied horizontally on the upper block. Find the frictional force on block of mass 30kg ? the time of flight is found [...]
Two small rings O and O’ are put on two vertical stationary rods AB and A’B’, respectively. One end of an inextensible thread is tied at point A’. The thread passes through ring O’ and its other end is tied to ring O. Assuming that ring O’ moves downwards at a constant velocity v1, then velocity v2 of the ring O, when ∠AOO’=α
22
Aug
Two small rings O and O’ are put on two vertical stationary rods AB and A’B’, respectively. One end of an inextensible thread is tied at point A’. The thread passes through ring O’ and its other end is tied to ring O. Assuming that ring O’ moves downwards at a constant velocity v1, then [...]
A U-shaped smooth wire has a semi-circular bending between A and B as shown in fig. A bead of mass m moving with uniform speed v through the wire enters the semiculcular bent at A and leaves at B. Find the average force exerted by the bead on the part AB of the wire.
22
Aug
A U-shaped smooth wire has a semi-circular bending between A and B as shown in fig. A bead of mass m moving with uniform speed v through the wire enters the semiculcular bent at A and leaves at B. Find the average force exerted by the bead on the part AB of the wire. the [...]
Two beads of masses m1 and m2 are connected to each other by massless string. Both beads are free to mover over fixed smooth circular loop in vertical plane. At any instant they are in the position shown and subtends angle 90∘ at centre. Find tangential accelerations of both beads and tension in the string if string remains taut.
22
Aug
Two beads of masses m1 and m2 are connected to each other by massless string. Both beads are free to mover over fixed smooth circular loop in vertical plane. At any instant they are in the position shown and subtends angle 90∘ at centre. Find tangential accelerations of both beads and tension in the string [...]
Find the minimum force required to keep a block of mass m in equilibrium on a rough inclined plane with inclination α and coefficient of friction μ(<tanα).
22
Aug
Find the minimum force required to keep a block of mass m in equilibrium on a rough inclined plane with inclination α and coefficient of friction μ(<tanα). the time of flight is found to be t. The acceleration with which the lift is moving up is When a body is thrown up in a lift [...]
A monkey of mass ′m′ climbs up to a rope hung over a fixed pulley with an acceleration g/4. The opposite end of the rope is tied to a block of mass M lying on a rough horizontal plane. The coefficient of friction between the block and horizontal plane is μ. Find the tension in the rope.
22
Aug
A monkey of mass ′m′ climbs up to a rope hung over a fixed pulley with an acceleration g/4. The opposite end of the rope is tied to a block of mass M lying on a rough horizontal plane. The coefficient of friction between the block and horizontal plane is μ. Find the tension in [...]
A box is falling freely. Inside the box, a particle is projected with some velocity v with respect to the box at an angle θ as shown in the figure. Assertion (A) : The path of the particle with respect to an oberver sitting in the box will be a straight line. Reasoning (R ) : The acceleration of particle with respect to the box is zero. Then,
22
Aug
A box is falling freely. Inside the box, a particle is projected with some velocity v with respect to the box at an angle θ as shown in the figure. Assertion (A) : The path of the particle with respect to an oberver sitting in the box will be a straight line. Reasoning (R ) [...]
When a body is thrown up in a lift with a velocity u relative to the lift, the time of flight is found to be t. The acceleration with which the lift is moving up is
22
Aug
When a body is thrown up in a lift with a velocity u relative to the lift, the time of flight is found to be t. The acceleration with which the lift is moving up is the time of flight is found to be t. The acceleration with which the lift is moving up is [...]