Physics
The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half 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 the lower half of the plane is given by.
28
Aug
The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half 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 the lower half of the plane is given by. [...]
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Chapter 6 - Friction
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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 ,
respectively ,
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 ,
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
28
Aug
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 [...]
Posted in:
Chapter 6 - Friction
,
NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
,
Physics
,
Tags:
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 ,
respectively ,
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 ,
A 0.5kg ball moving with a speed of 12m/s strikes a hard wall at an angle of 30 with the wall. It is reflected with the same speed and at the same angle, as shown in figure. If the ball is in contact with the wall for 0.25s the average force acting on the wall is
28
Aug
A 0.5kg ball moving with a speed of 12m/s strikes a hard wall at an angle of 30 with the wall. It is reflected with the same speed and at the same angle, as shown in figure. If the ball is in contact with the wall for 0.25s the average force acting on the wall [...]
Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is –
28
Aug
Three forces acting on a body are shown in the figure. To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is – the magnitude of the minimum additional force needed is - Three forces acting on a body are shown in the figure. To have the resultant [...]
A balloon with mass ‘m’ is descending down with an acceleration ‘a’ (where ag). How much mass should be removed from it so that is starts moving up with an acceleration ′a′?
28
Aug
A balloon with mass ‘m’ is descending down with an acceleration ‘a’ (where ag). How much mass should be removed from it so that is starts moving up with an acceleration ′a′? A balloon with mass 'm' is descending down with an acceleration 'a' (where ag). How much mass should be removed from it so [...]
A body, under the action of a force F = 6i – 8j +10k , acquires an acceleration of 1 m/s. The mass of
28
Aug
A body, under the action of a force F = 6i – 8j +10k , acquires an acceleration of 1 m/s. The mass of A body acquires an acceleration of 1 m/s. The mass of under the action of a force F = 6i - 8j +10k August 28, 2020 Category: Chapter 5 - NLM [...]
A person of mass 60 kg is inside a lift of mass 940 kg and posses the button on control panel . The lift starts moving upwards with an acceleration 1 m/ s2. If g= 10 m/s2 the tension in the supporting cable is
28
Aug
A person of mass 60 kg is inside a lift of mass 940 kg and posses the button on control panel . The lift starts moving upwards with an acceleration 1 m/ s2. If g= 10 m/s2 the tension in the supporting cable is The mass of lift is 2000 kg. When the tension in [...]
Three blocks with masses m, 2 m and 3 m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2 m ? (g is the acceleration due to gravity).
28
Aug
Three blocks with masses m, 2 m and 3 m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2 m ? (g is the acceleration due [...]
A system consists of three identical 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
28
Aug
A system consists of three identical 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 A [...]
Three blocks a, b and c, of masses 4 kg , 2kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4 kg block, then the contact force between a and b is:
28
Aug
Three blocks a, b and c, of masses 4 kg , 2kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4 kg block, then the contact force between a and b is: 2kg and 1 kg respectively are in contact [...]