In the Fig. shown a time dependent force F expressed as $F = k t$ is applied on a block of mass 5 kg. Coefficient of static and kinetic friction is $μ_{s} = 0.4$ and $μ_{k} = 0.3$ . Motion begins when $t = 2$ sec draw a acceleration vs time graph for block. $(m = 5 k g, μ_{s} = 0.4, μ_{k} = 0.3)$

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Step by step video & image solution for In the Fig. shown a time dependent force F expressed as F=kt is applied on a block of mass 5 kg. Coefficient of static and kinetic friction is mu_(s)=0.4 and mu_(k)=0.3. Motion begins when t=2 sec draw a acceleration vs time graph for block. (m=5 kg, mu_(s)=0.4, mu_(k)=0.3) by Physics experts to help you in doubts & scoring excellent marks in Class 11 exams.

Updated on:21/07/2023

Class 11 PHYSICS FORCE ANALYSIS

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A block of mass M is sliding down the plane. Coefficient of static friction is $μ_{s}$ and kinetic friction is $μ_{k}$ . Then friction force acting on the block is :

A $(F + M g) sin θ$
B $μ_{k} (F + M g) cos θ$
C $μ_{s} M g cos θ$
D $(M g + F) sin θ$
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A force $F = 2 t$ is spplied at $t = 0$ sec to the block of mass m placed on a rough horizontal surface. The coefficient of static and kinetic friction between the block and surface are $μ_{S}$ and $μ_{k}$ rspectively. Which of the following graphs best represents the acceleration vs time of the block $(μ_{S} > μ_{k})$ ?
A
B
C
D
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In Fig the block are at rest a force of $10 N$ act on the block of $4 k g$ mass .The coefficient of staic friction and the coefficient of kinetic friction are $μ_{s} = 0.2 and μ_{s} = 0.15$ for both the surface in contact The magnitudeof frcition force acting between the surface of contact between the $2 k g$ and $4 k g$ block in this situation is

A $3 N$
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C $3.33 N$
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A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and $10 m / s^{- 2}$ . If a horizontal force of 50N is applied on the block, the frictional force is
A25N
B5N
C10N
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A block of mass m is placed over a rogh surface with coefficents of static and kinetic as $μ_{s} and μ_{k} .$ A force F is applied to move block .Surface f is the force of fricty=tion between block and ound . Then chose the wrong opition (s).

A $f \leq μ_{s} m g till the block not move$
B $f = μ_{k}$ mg when the block starts moving
C $f = F$ when block Is not moving
D $f < F$ when block is moving

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Knowledge Check

A block of mass M is sliding down the plane. Coefficient of static friction is $μ_{s}$ and kinetic friction is $μ_{k}$ . Then friction force acting on the block is :

A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and $10 m / s^{- 2}$ . If a horizontal force of 50N is applied on the block, the frictional force is

A block of mass m is placed over a rogh surface with coefficents of static and kinetic as $μ_{s} and μ_{k} .$ A force F is applied to move block .Surface f is the force of fricty=tion between block and ound . Then chose the wrong opition (s).

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ANURAG MISHRA-FORCE ANALYSIS-Example

In the Fig. shown a time dependent force F expressed as F = k t is applied on a block of mass 5 kg. Coefficient of static and kinetic friction is μ s = 0.4 and μ k = 0.3 . Motion begins when t = 2 sec draw a acceleration vs time graph for block. ( m = 5 k g , μ s = 0.4 , μ k = 0.3 )

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A block of mass M is sliding down the plane. Coefficient of static friction is μs and kinetic friction is μk. Then friction force acting on the block is :

A force F=2t is spplied at t=0 sec to the block of mass m placed on a rough horizontal surface. The coefficient of static and kinetic friction between the block and surface are μS and μk rspectively. Which of the following graphs best represents the acceleration vs time of the block(μS>μk)?

A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and 10m/s−2. If a horizontal force of 50N is applied on the block, the frictional force is

A block of mass m is placed over a rogh surface with coefficents of static and kinetic as μsandμk. A force F is applied to move block .Surface f is the force of fricty=tion between block and ound . Then chose the wrong opition (s).

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ANURAG MISHRA-FORCE ANALYSIS-Example

A block of mass M is sliding down the plane. Coefficient of static friction is $μ_{s}$ and kinetic friction is $μ_{k}$ . Then friction force acting on the block is :

A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and $10 m / s^{- 2}$ . If a horizontal force of 50N is applied on the block, the frictional force is

A block of mass m is placed over a rogh surface with coefficents of static and kinetic as $μ_{s} and μ_{k} .$ A force F is applied to move block .Surface f is the force of fricty=tion between block and ound . Then chose the wrong opition (s).