Quiz - physics - Friction-PYQ

Q1. A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches 30°, the box starts to slip and slides 4.0 m down the plank in 4.0 s. The coefficients of static and kinetic friction between the box and the plank will be, respectively Source: orcusprep.in

NEET 2015

medium

0.5 and 0.6

0.4 and 0.3

0.6 and 0.6

0.6 and 0.5

Q2. A block A of mass m1 rests on a horizontal table. A light string connected to it passes over a frictionless pulley at the edge of table and from its other end another block B of mass m2 is suspended. The coefficient of kinetic friction between the block and the table is µk. When the block A is sliding on the table, the tension in the string is Source: orcusprep.in

NEET 2015 Cancelled

medium

\( \frac{m_1m_2(1+\mu_k)}{m_1+m_2}g \)

\( \frac{m_1m_2(1-\mu_k)}{m_1+m_2}g \)

\( \frac{(m_2+m_1\mu_k)g}{m_1+m_2} \)

\( \frac{(m_2-m_1\mu_k)g}{m_1+m_2} \)

Q3. A system consists of three masses m1, m2 and m3 connected by a string passing over a pulley P. The mass m1 hangs freely and m2 and m3 are on a rough horizontal table (the coefficient of friction = µ). The pulley is frictionless and of negligible mass. The downward acceleration of mass m1 is (Assume m1 = m2 = m3 = m) Source: orcusprep.in

NEET 2014

hard

\( g(1-\mu)/9 \)

\( 2g\mu/3 \)

\( g(1-2\mu)/3 \)

\( g(1-2\mu)/2 \)

Q4. The upper half of an inclined plane of inclination θ is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by Source: orcusprep.in

NEET 2013

medium

\( \mu = 2\tan\theta \)

\( \mu = \tan\theta \)

\( \mu = 1/\tan\theta \)

\( \mu = 2/\tan\theta \)

Q5. A conveyor belt is moving at a constant speed of 2 m s⁻¹. A box is gently dropped on it. The coefficient of friction between them is µ = 0.5. The distance that the box will move relative to belt before coming to rest on it, taking g = 10 m s⁻², is Source: orcusprep.in

NEET Mains 2011

easy

0.4 m

1.2 m

0.6 m

zero

Q6. A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is µ. The acceleration a of the cart that will prevent the block from falling satisfies Source: orcusprep.in

NEET 2010

hard

\( a > mg/\mu \)

\( a > g/m\mu \)

\( a \geq g/\mu \)

\( a < g/\mu \)

Q7. A block B is pushed momentarily along a horizontal surface with an initial velocity V. If µ is the coefficient of sliding friction between B and the surface, block B will come to rest after a time Source: orcusprep.in

NEET 2007

easy

gm/V

μg/V

V/gμ

V/(gm)

Q8. The coefficient of static friction, µs, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move ? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s²) Source: orcusprep.in

NEET 2004

medium

2.0 kg

4.0 kg

0.2 kg

0.4 kg

Q9. A block of mass 10 kg placed on rough horizontal surface having coefficient of friction µ = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be Source: orcusprep.in

NEET 2002

easy

10 m/s²

5 m/s²

15 m/s²

0.5 m/s²

Q10. On the horizontal surface of a truck a block of mass 1 kg is placed (µ = 0.6) and truck is moving with acceleration 5 m/s² then the frictional force on the block will be Source: orcusprep.in

NEET 2001

medium

5 N

6 N

5.88 N

8 N

Q11. A block has been placed on a inclined plane with the slope angle θ, block slides down the plane at constant speed. The coefficient of kinetic friction is equal to Source: orcusprep.in

NEET 1993

easy

sinθ

cosθ

g

tanθ

Q12. Consider a car moving along a straight horizontal road with a speed of 72 km/h. If the coefficient of static friction between the tyres and the road is 0.5, the shortest distance in which the car can be stopped is (taking g = 10 m/s²) Source: orcusprep.in

NEET 1992

easy

30 m

40 m

72 m

20 m

Q13. A heavy uniform chain lies on horizontal table top. If the coefficient of friction between the chain and the table surface is 0.25, then the maximum fraction of the length of the chain that can hang over one edge of the table is Source: orcusprep.in

NEET 1991

medium

20%

25%

35%

15%

Q14. Starting from rest, a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is Source: orcusprep.in

NEET 1988

medium

0.80

0.75

0.25

0.33

Q15. There are two inclined surfaces of equal length and same angle of inclination with the horizontal. One of them is rough and the other is perfectly smooth. A given body takes 2 times as much time to slide down on rough surface than on the smooth surface. The coefficient of kinetic friction between the object and the rough surface is close to Source: orcusprep.in

NEET 2025

medium

0.5

0.75

0.25

0.40

Q16. A block of mass 2kg is placed on inclined rough surface AC (as shown in figure) of coefficient of friction μ. If g = 10m s⁻², the net force (in N ) on the block will be : Source: orcusprep.in

NEET 2023 mpr

medium

10√3

zero

10

20

Q17. What is the maximum acceleration of a body on a horizontal floor if the coefficient of static friction between the body and the floor is 0.15 (g = 10m s⁻²) Source: orcusprep.in

NEET 2023

easy

150m s⁻²

1.5m s⁻²

50m s⁻²

1.2m s⁻²

Q18. A block of mass 2kg is placed on inclined rough surface AC (as
shown in figure) of coefficient of friction µ. If g = 10m/s², the net
force (in N ) on the block will be :
Source: orcusprep.in

NEET 2023 mpr

medium

10

10√3

20

0

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Physics - Friction-PYQ

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Physics - Friction-PYQ

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