Check the equation 1/2mvsquare=mgh is dimensionally correct or not
A smooth block is released at rest on a 45∘ incline and then slides a distance d. The time taken by the block to slide equal distances on rough incline is n times as much to slide on smooth incline of same angle of inclination. Then the coefficient of friction is
DetetDete the maximum acceleration of the train in which a box is lying on its floor will remain stationary given that the coefficient of static friction between the box and the trains floor is 0.15
Take g = 10m/s2
- 7.6 m/sec2
- 10 m/sec2
- 6.7 m/sec2
- 4.7 m/sec2
- 2 N and 2 N
- 1 N and 1 N
- 1 N and 3 N
- 1 N and 4 N
Where will a body weigh more 1 km above the surface of the earth or 1 km below the surface of the earth?
[Take Z axis to be perpendicular to the plane of the paper.]
- The minimum moment of inertia (about Z-axis), Izz of the system is 5ml2.
- The magnitude of tension in the rod in the subsequent motion is 2mv209l.
- The ratio of moment of inertia about Z - axis at points A and B, (Izz)A(Izz)B=2
- Point C remains stationary during subsequent motion.
- 10 N
- 15 N
- 20 N
- 25 N
- 15−4√3 m/s2
- 5−√ m/s2
- √ m/s2
- 5 m/s2
Find the accelerations a1, a2, a3 of the three blocks shown in figure (6-E8) if a horizontal force of 10 N is applied on (a) 2 kg block, (b) 3 kg block (c) 7 kg Block. Take g = 10m/s2
- 140 N
- 100 N
- 120 N
- 50 N
Find the acceleration of the block of mass M in the situation of figure (6-E10). The coefficient of friction between the two blocks is μ1 and that between the bigger block and the ground is μ2.
- The conservation of linear momentum can be applied in both the cases just before and just after collision
- The conservation of linear momentum can be applied in case I but cannot be applied in case II just before and just after collision
- The ratio of velocities of mass m just after collision in first and second cases is 12
- The ratio of velocities of mass m just after collision in first and second case is 2.
A father and son pushed their car to bring it to the side of the road as it had stalled in the middle of the road. They experienced that although they had to push with all their might initially to move the car, the push required to keep the car rolling was smaller, once the car started rolling. Explain.
The friction coefficient between an athlete's shoes and the ground is 0.90. Suppose Superman wears these shoes and races for 50 m. There is not upper limit on his capacity of running at high speeds.
Find the minimum time that he will have to take in completing the 50 m starting from rest.
There is no limit to superman's speed. 50 m he can do in the blink of an eye
The friction coefficient between the two blocks shown in figure (6-E9) is μ but the floor is smooth.
(a) What maximum horizontal force F can be applied without disturbing the equilibrium of the system?
(b) Suppose the horizontal force applied is double of that found in Part (a). Find the accelerations of the two masses.
- one who pulls the rope with a greater force
- one who applies more friction force (shear force) on ground
- one who applies more normal force(compressive force) on ground
- one whose weight is more
Solve the previous problem if the friction coefficient between the 2.0 kg block and the plane below it is 0.5 and the plane below the 4.0 kg block is frictionless.