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Q1. A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is

(a) 0.2 J
(b) 10 J
(c) 20 J
(d) 0.1 J

Q2. If a body loses half its velocity on penetrating 3 cm in a wooden block, then how much will it penetrate more before coming to rest?

(a) 1 cm
(b) 2 cm
(c) 3 cm
(d) 4 cm

Q3. A cylinder rolls up an inclined plane, reaches some height and then rolls down (without slipping throughout these motions). The directions of frictional force acting on the cylinder are—

(a) up the incline while ascending and down the incline while descending
(b) up the incline while ascending as well as descending
(c) down the incline while ascending and up the incline while descending
(d) down the incline while ascending as well as descending

Q4. A light string passing over a smooth light pulley connects two blocks of masses m1 and m2 (vertically). If the acceleration of the system is (g/8), then the ratio of masses is—

(a) 8 : 1
(b) 9 : 7
(c) 4 : 3
(d) 5 : 3

Q5. A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 m/s2)—

(a) 100 m/s2
(b) 3 m/s2
(c) 10 m/s2
(d) 30 m/s2

Q6. On the horizontal surface of a truck, a block of mass 1 kg is placed (µ = 0.6) and truck is moving with an acceleration of 5 m/s2, then the frictional force on the block will be—

(a) 5 N
(b) 6 N
(c) 5.88 N
(d) 8 N


0 votes
1 Answer
736 views

A Block Of Mass 5kg Is Resting On A Smooth Surface. At What Angle A Force Of 20N Be Acted On The Body So That It Will Acquired A Kinetic Energy Of 40J After Moving 4m.

Modified 234 Year Ago

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234 Year Ago

A Block Of Mass 5kg Is Resting On A Smooth Surface. At What Angle A Force Of 20N Be Acted On The Body So That It Will Acquired A Kinetic Energy Of 40J After Moving 4m.

0 votes
1 Answer
717 views

A Mass Of M Kg Is Suspended By A Weightless String. The Horizontal Force That Is Required To Displace It Until The String Makes An Angle Of 45° With The Initial Vertical Direction Is

Modified 17 Year Ago

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17 Year Ago

A Mass Of M Kg Is Suspended By A Weightless String. The Horizontal Force That Is Required To Displace It Until The String Makes An Angle Of 45° With The Initial Vertical Direction Is

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1 Answer
678 views

A Ball Is Dropped From Height 20 M. If Coefficient Of Restitution Is 0.9 What Will Be The Height Attained After First Bounce?

Modified 17 Year Ago

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17 Year Ago

A Ball Is Dropped From Height 20 M. If Coefficient Of Restitution Is 0.9 What Will Be The Height Attained After First Bounce?

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1 Answer
503 views

A 50kg Man With 20kg Load On His Head Climbs Up 20 Steps Of 0.25m Height Each

Modified 204 Year Ago

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204 Year Ago

A 50kg Man With 20kg Load On His Head Climbs Up 20 Steps Of 0.25m Height Each

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A Particle Of Mass 100g Thrown Vertically Upwards With A Speed Of 5m/s.

Modified 234 Year Ago

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234 Year Ago

A Particle Of Mass 100g Thrown Vertically Upwards With A Speed Of 5m/s.

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1 Answer
472 views

If Force And Displacement Of Particle In Direction Force Are Doubled.Work Would Be

Modified 234 Year Ago

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If Force And Displacement Of Particle In Direction Force Are Doubled.Work Would Be

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