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A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and fixed and moment of inertia about it is I. A weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the wheel will be.
23
Oct
A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and fixed and moment of inertia about it is I. A weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the [...]
A uniform rod of length L is placed with one end in contact with the horizontal and is then inclined at an angle α to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be
23
Oct
A uniform rod of length L is placed with one end in contact with the horizontal and is then inclined at an angle α to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be If a ladder weighing 250 N is placed against a [...]
A block of base 10cm×10cm and height 15cm is kept on an inclined plane. The coefficient of friction between them is 3–√. The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0∘. Then
23
Oct
A block of base 10cm×10cm and height 15cm is kept on an inclined plane. The coefficient of friction between them is 3–√. The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0∘. Then If a ladder weighing 250 N is placed against a smooth vertical wall having coefficient of [...]
A rectangular block has a square base measuring a × a and its height is h. It moves on a horizontal surface in a direction perpendicular to one of the edges. The coefficient of friction is μ. It will topple if
23
Oct
A rectangular block has a square base measuring a × a and its height is h. It moves on a horizontal surface in a direction perpendicular to one of the edges. The coefficient of friction is μ. It will topple if If a ladder weighing 250 N is placed against a smooth vertical wall having [...]
A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an angle θ with the vertical such that tanθ is equal to
23
Oct
A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an angle θ with the vertical such that tanθ is equal to A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an [...]
A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500N and its CG at 1/3rd distance from the lower end. Wall’s reaction will be (in newton)
23
Oct
A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500N and its CG at 1/3rd distance from the lower end. Wall’s reaction will be (in newton) A ladder rests against a frictionless vertical [...]
An earthenware vessel loses 1 g of water per second due to evaporation. The water equivalent of the vessel is 0.5 kg and the vessel contains 9.5 kg of water. Find the time required for
23
Oct
An earthenware vessel loses 1 g of water per second due to evaporation. The water equivalent of the vessel is 0.5 kg and the vessel contains 9.5 kg of water. Find the time required for An earthenware vessel loses 1 g of water per second due to evaporation. The water equivalent of the vessel is [...]
Equal masses of three liquids A, B and C are taken. Their initial temperatures are 10 c, 25 C and 40 C, respectively. When A and B are mixed the temperature of the mixture is 19 C.
23
Oct
Equal masses of three liquids A, B and C are taken. Their initial temperatures are 10 c, 25 C and 40 C, respectively. When A and B are mixed the temperature of the mixture is 19 C. 25 C and 40 C B and C are taken. Their initial temperatures are 10 c Equal masses [...]
Victoria Falls in Africa is 122 m in height. Calculate the rise in temperature of the water if all the potential energy lost in the fall is converted into heat.
23
Oct
Victoria Falls in Africa is 122 m in height. Calculate the rise in temperature of the water if all the potential energy lost in the fall is converted into heat. Victoria Falls in Africa is 122 m in height. Calculate the rise in temperature of the water if all the potential energy lost in the [...]
Equal volumes of three liquids of densities rho 1, rho 2 and rho 3, specific heat capacities c1, c2 and c3 and temperatures t1, t2 and t3, respectively, are mixed together. What is the
23
Oct
Equal volumes of three liquids of densities rho 1, rho 2 and rho 3, specific heat capacities c1, c2 and c3 and temperatures t1, t2 and t3, respectively, are mixed together. What is the are mixed together. What is the c2 and c3 and temperatures t1 Equal volumes of three liquids of densities rho 1 [...]