Physics-
General
Easy
Question
An initially stationary wooden block with a mass of 2 kg is pulled horizontally along a table with a time dependent force 
The coefficients of static and kinetic friction between the block and the table are 0.5 and 0.25 respectively. F(t) as a function of time is shown. Taking : 
The graph of friction force (f) with time will be
The correct answer is:
Related Questions to study
physics-
The system shown is just on the verge of slipping . The co-efficient of static friction between the block and the table top is:
The system shown is just on the verge of slipping . The co-efficient of static friction between the block and the table top is:
physics-General
physics-
Two trolley A and B are moving with accelerations a and 2a respectively in the same direction. To an observer in trolley A, the magnitude of pseudo force acting on a block of mass m on the trolley B is
Two trolley A and B are moving with accelerations a and 2a respectively in the same direction. To an observer in trolley A, the magnitude of pseudo force acting on a block of mass m on the trolley B is
physics-General
chemistry-
Which of the following pairs of structures shows geometrical isomerism
I) 
II) 
III) 
IV) 
Which of the following pairs of structures shows geometrical isomerism
I)
II)
III)
IV)
chemistry-General
chemistry-
In both the complexes Co have 
configuration The bond energy of (O — O) in X and Y is :
In both the complexes Co have configuration The bond energy of (O — O) in X and Y is :
chemistry-General
physics-
Two smooth balls A and B, each of mass m and radius R, have their centre at (0,0,R) and at (5R,–R,R) respectively, in a coordinate system as shown. Ball A, moving along positive x axis, collide with ball B. Just before the collision, speed of ball A is 4 m/s and ball B is stationary. The collision between the balls is elastic Coefficient of restitution during the collision is changed to 1/2, keeping all other parameters unchanged. What is the velocity of the ball B after the collision?
Two smooth balls A and B, each of mass m and radius R, have their centre at (0,0,R) and at (5R,–R,R) respectively, in a coordinate system as shown. Ball A, moving along positive x axis, collide with ball B. Just before the collision, speed of ball A is 4 m/s and ball B is stationary. The collision between the balls is elastic Coefficient of restitution during the collision is changed to 1/2, keeping all other parameters unchanged. What is the velocity of the ball B after the collision?
physics-General
physics-
There are two massless springs A and B of spring constant 
and 
respectively and 
If 
and 
be denoted as work done on A and work done on B respectively, then
There are two massless springs A and B of spring constant and respectively and If and be denoted as work done on A and work done on B respectively, then
physics-General
physics-
In the arrangement shown, all surfaces are frictionless. The rod R is constrained to move vertically. The vertical acceleration of R is 
and the horizontal acceleration of the wedge W is 
The ratio / is equal to
In the arrangement shown, all surfaces are frictionless. The rod R is constrained to move vertically. The vertical acceleration of R is and the horizontal acceleration of the wedge W is The ratio / is equal to
physics-General
physics-
In the figure shown, A & B are free to move. All the surfaces are smooth. 
In the figure shown, A & B are free to move. All the surfaces are smooth.
physics-General
physics-
In the figure shown man is balanced by counter weight of same mass. He starts to climb the rope with an accelerator of 
w.r.t. rope. The time after which he reaches the pulley will be
In the figure shown man is balanced by counter weight of same mass. He starts to climb the rope with an accelerator of w.r.t. rope. The time after which he reaches the pulley will be
physics-General
physics-
In the fig. at the free end of the light string, a force F is appled to keep the suspended mass of 18 kg at rest. Assuming pulley is light then the force exerted by the ceiling on the system is:
In the fig. at the free end of the light string, a force F is appled to keep the suspended mass of 18 kg at rest. Assuming pulley is light then the force exerted by the ceiling on the system is:
physics-General
physics-
System is shown in figure. All the surfaces are smooth. Rod is moved by external agent with acceleration 9 m/s2 vertically downwards. Force exerted on the rod by the wedge will be:
System is shown in figure. All the surfaces are smooth. Rod is moved by external agent with acceleration 9 m/s2 vertically downwards. Force exerted on the rod by the wedge will be:
physics-General
physics-
Find the time in which 2 kg mass will strikes the pulley after being released from rest.
Find the time in which 2 kg mass will strikes the pulley after being released from rest.
physics-General
physics-
Two blocks A & B with mass 4 kg and 6 kg respectively are connected by a stretched spring of negligible mass as in figure . When the two blocks are released simultaneously the initial acceleration of B is 1.5 m/s2 westward . The acceleration of A is :
Two blocks A & B with mass 4 kg and 6 kg respectively are connected by a stretched spring of negligible mass as in figure . When the two blocks are released simultaneously the initial acceleration of B is 1.5 m/s2 westward . The acceleration of A is :
physics-General
physics-
Three blocks are connected as shown in the figure, on a horizontal frictionless table and pulled to the right with a force at 60N. if 
= 10kg, 
= 20kg and 
= 30 kg then the value of 
is
Three blocks are connected as shown in the figure, on a horizontal frictionless table and pulled to the right with a force at 60N. if = 10kg, = 20kg and = 30 kg then the value of is
physics-General
physics-
Fig shows two pulley arrangements for lifting a mass m. In
a) the mass is lifted by attaching a mass 2m while in
b) the mass is lifted by pulling the other end with a downward force F=2mg, If 
and 
are the accelerations of the two masses then
Fig shows two pulley arrangements for lifting a mass m. In
a) the mass is lifted by attaching a mass 2m while in
b) the mass is lifted by pulling the other end with a downward force F=2mg, If and are the accelerations of the two masses then
physics-General
