Test Details

Force And Pressure

Dec 15, 8:00 PM

60 minutes

Dec 15, 9:00 PM

50.0 marks

MCQ

25 questions

Vikrant Kalyankar

I have done M.Sc. in Physics from SRTMUN Campus. Also I have done B.Sc. in (Physics, Chemistry, Math). I would teach the way the students would love to. You just need to focus for that time when you are with me.

Class Details

Science

Foundation Batch JEE/NEET

Science

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Question Text

Question 1 :
State whether true or False 10 mN is equal to $10^{-3}$ dynes.

Question 2 :
If force $\vec {F} = 5\hat {i} + 3\hat {kj} + 4\hat {k}$ makes a displacement of $\vec {s} = 6\hat {i} - 5\hat {k}$, work done by the force is

Question 4 :
A block of mass $'m'$ is placed on floor of a lift which is rough. The coefficient of friction between the block and the floor is $\displaystyle \mu $. When the lift falls freely, the block is pulled horizontally on the lift floor. The force of friction is:

Question 5 :
A toy car released with the same initial speed will travel farthest on:

Question 6 :
A body of mass m = ${ m=10 }^{ -2 }$ kg is moving in a medium and experiences a frictional force ${F =kv }^{ -2 }.$ Its initial speed is ${ v }_{ 0 }=10{ ms }^{ -1 }$. If after 10 s,its energy is $\dfrac { 1 }{ 8 } { mv }_{ 0 }^{ 2 }$, the value of k will be

Question 7 :
Assertion: More force is required to push a body up a rough inclined plane than that to move the same body down the same plane Reason: The friction always acts parallel to inclined plane downwards

Question 8 :
The state of rest or state of motion of a body can be changed by using

Question 9 :
STATEMENT-1 It is easier to pull a heavy object than to push it on a level ground. STATEMENT-2 The magnitude of frictional force depends on the nature of the two surfaces in contact.

Question 11 :
In cold weather, we rub our hands to warm them. The force involved in this force is:

Question 12 :
Choose the correct statement(s) about the frictional force between two solid surfaces in contact

Question 13 :
Which of the following laws represents the qualitative measure of force?

Question 14 :
A conducting rod of mass m and length l is placed in the east-west direction on a frictionless horizontal table. The horizontal component of earth's magnetic field is B from south to north. If charge q is suddenly passed through the conductor, then the instantaneous velocity acquired by the rod is

Question 15 :
Which of the following activity would not be possible in the absence of friciton?

Question 16 :
A man exerts same pressure on the ground whether he is standing or he is lying.

Question 19 :
A block of mass $2$ kg rests on a rough inclined plane making an angle of $30^0$ with the horizontal. The coefficient of static friction between the block and the plane is $0.7.$ The frictional force on the block is

Question 21 :
Whenever the surfaces in contact, tend to move or move with respect to each other, the force of friction comes into play:

Question 22 :
A body, under the action of a force $\vec{F}=6\hat{i}-8\hat{j}+10\hat{k}$, acquires an acceleration of 1 $m/s^2$. The mass of this body must be :

Question 23 :
A $2\ kg$ mass starts from rest on an inclined smooth surface with inclination ${30}^{o}$ and length $2\ m$. How much will it travel before coming into rest on a horizontal frictional surface with frictional coefficient of $0.25$

Question 24 :
State whether the statement are true or false- Frictional force is a non-contact force.

Question 25 :
Driving a car on a wet road is difficult because water

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