REVISION TEST 3 (Ch 4,5) Class-11 (30.01.25) M.M….
25
1.What is meant by banking of roads? Explain the need for it. Obtain an expression for the maximum speed with which a vehicle can
safely negotiate a curved road banked at angle θ. The coefficient of friction between road and wheels is μ. (5)
2.(a)A person of mass m is standing in a lift. Write expression for his apparent weight when the lift is (i) moving upward with uniform
acceleration ‘a’ (ii) moving downward with uniform acceleration ‘a’ (a<g) and (c) falls freely.
(b) Explain why (i) China wares are wrapped in straw papers before packing (ii) shockers are used in vehicles.
(c) Name the physical quantity which gives a measure of quantity of motion contained in a moving body. Also draw the graph
showing the variation of this physical quantity with velocity for an object with constant mass. (5)
3.Forces of 5√2N and 6√2N are acting on a body of mass 1000kg at an angle 60degrees to each other. Find the acceleration and
distance covered of the mass after 10s. (3)
4.Assertion : A block placed on a table is at rest, because action force cancels the reaction force on the block.
Reason : The net force on the block is zero. (1)
5.Assertion: Friction is a necessary evil
Reason: Though friction dissipates power, but without friction we cannot walk. (1)
6.How does a perfectly inelastic collision differ from a perfectly elastic collision? Two particles of mass m1 and m2 having velocities
U1 and U2 respectively make a head on collision. Derive the relation for their final velocities. Discuss the following special cases. (i)
m1 = m2, (ii) m1 >> m2 and U2 = 0 and (iii) m1 << m2 and U1 = 0. (5)
7.An object of mass 0.4kg moving with a velocity of 4m/s collides with another object of mass 0.6kg moving in the same direction
with a velocity of 2m/s. If the collision is perfectly inelastic, what is the loss of K.E. due to impact? (3)
8.Prove work energy theorem for a variable force. (2)
REVISION TEST 3 (Ch 4,5) Class-11 (30.01.25) M.M….25
1.What is meant by banking of roads? Explain the need for it. Obtain an expression for the maximum speed with which a vehicle can
safely negotiate a curved road banked at angle θ. The coefficient of friction between road and wheels is μ. (5)
2.(a)A person of mass m is standing in a lift. Write expression for his apparent weight when the lift is (i) moving upward with uniform
acceleration ‘a’ (ii) moving downward with uniform acceleration ‘a’ (a<g) and (c) falls freely.
(b) Explain why (i) China wares are wrapped in straw papers before packing (ii) shockers are used in vehicles.
(c) Name the physical quantity which gives a measure of quantity of motion contained in a moving body. Also draw the graph
showing the variation of this physical quantity with velocity for an object with constant mass. (5)
3.Forces of 5√2N and 6√2N are acting on a body of mass 1000kg at an angle 60degrees to each other. Find the acceleration and
distance covered of the mass after 10s. (3)
4.Assertion : A block placed on a table is at rest, because action force cancels the reaction force on the block.
Reason : The net force on the block is zero. (1)
5.Assertion: Friction is a necessary evil
Reason: Though friction dissipates power, but without friction we cannot walk. (1)
6.How does a perfectly inelastic collision differ from a perfectly elastic collision? Two particles of mass m1 and m2 having velocities
U1 and U2 respectively make a head on collision. Derive the relation for their final velocities. Discuss the following special cases. (i)
m1 = m2, (ii) m1 >> m2 and U2 = 0 and (iii) m1 << m2 and U1 = 0. (5)
7.An object of mass 0.4kg moving with a velocity of 4m/s collides with another object of mass 0.6kg moving in the same direction
with a velocity of 2m/s. If the collision is perfectly inelastic, what is the loss of K.E. due to impact? (3)
8.Prove work energy theorem for a variable force. (2)
REVISION TEST 3 (Ch 4,5) Class-11 (30.01.25) M.M….25
1.What is meant by banking of roads? Explain the need for it. Obtain an expression for the maximum speed with which a vehicle can
safely negotiate a curved road banked at angle θ. The coefficient of friction between road and wheels is μ. (5)
2.(a)A person of mass m is standing in a lift. Write expression for his apparent weight when the lift is (i) moving upward with uniform
acceleration ‘a’ (ii) moving downward with uniform acceleration ‘a’ (a<g) and (c) falls freely.
(b) Explain why (i) China wares are wrapped in straw papers before packing (ii) shockers are used in vehicles.
(c) Name the physical quantity which gives a measure of quantity of motion contained in a moving body. Also draw the graph
showing the variation of this physical quantity with velocity for an object with constant mass. (5)
3.Forces of 5√2N and 6√2N are acting on a body of mass 1000kg at an angle 60degrees to each other. Find the acceleration and
distance covered of the mass after 10s. (3)
4.Assertion : A block placed on a table is at rest, because action force cancels the reaction force on the block.
Reason : The net force on the block is zero. (1)
5.Assertion: Friction is a necessary evil .Reason: Though friction dissipates power, but without friction we cannot walk. (1)
6.How does a perfectly inelastic collision differ from a perfectly elastic collision? Two particles of mass m1 and m2 having velocities
U1 and U2 respectively make a head on collision. Derive the relation for their final velocities. Discuss the following special cases. (i)
m1 = m2, (ii) m1 >> m2 and U2 = 0 and (iii) m1 << m2 and U1 = 0. (5)
7.An object of mass 0.4kg moving with a velocity of 4m/s collides with another object of mass 0.6kg moving in the same direction
with a velocity of 2m/s. If the collision is perfectly inelastic, what is the loss of K.E. due to impact? (3)
8.Prove work energy theorem for a variable force. (2)
