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A plank of mass M is moving on a smooth horizontal surface with speed ‘v_(0)’. At t=0 a sphere of mass ‘m’ and radius ‘r’ is gently placed on it and simultaneously a constant horizontal force ‘F’ is applied on the plank in the opposite direction of v_(0). Find the time at which sphere starts rolling on the plank. The coefficient of friction between the plank and the sphere is mu.
23
Aug
A plank of mass M is moving on a smooth horizontal surface with speed ‘v_(0)’. At t=0 a sphere of mass ‘m’ and radius ‘r’ is gently placed on it and simultaneously a constant horizontal force ‘F’ is applied on the plank in the opposite direction of v_(0). Find the time at which sphere starts [...]
Three vectors which are coplanar with respect to a certain reactangular coordinate system are given by → a =4 → i – → j , → b =-3 → i +2 → j and → c =-3 → j .Find (i) → a + → b + → c ,(ii) → a + → b – → c .
23
Aug
Three vectors which are coplanar with respect to a certain reactangular coordinate system are given by → a =4 → i – → j , → b =-3 → i +2 → j and → c =-3 → j .Find (i) → a + → b + → c ,(ii) → a + → b [...]
A sphere of radius R is projected with a reverse spin omega_(0) down a rough inclined plane with a speed v_(0) for which coefficient of friction is mu gt tantheta, where theta is angle of the inclination. Show that it will turn back if
23
Aug
A sphere of radius R is projected with a reverse spin omega_(0) down a rough inclined plane with a speed v_(0) for which coefficient of friction is mu gt tantheta, where theta is angle of the inclination. Show that it will turn back if A sphere of radius R is projected with a reverse spin [...]
if vector a is 4i -3j and b vector is 6i +8j then magnitude and direction of vector a+b is
23
Aug
if vector a is 4i -3j and b vector is 6i +8j then magnitude and direction of vector a+b is f vector a is 4i -3j and b vector is 6i +8j then magnitude and direction of vector a+b is August 23, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A spool of thread of mass m and moment of inertia I is attached to the block of mass M. Along a horizontal line passing through the centre of the spool, a constant force F is applied as shown. The surface under the block is smooth while beneath the spool is rough. Show that if M=(I)/(r(R-r)), no frictional force will act on the spool. Now suppose M=(2I)/(r(R-r)), find in which direction will the frictional force act? Also find in this case the rate of increase of length ‘ab’ of the thread at time t after the application of force. (No slipping occurs.)
23
Aug
A spool of thread of mass m and moment of inertia I is attached to the block of mass M. Along a horizontal line passing through the centre of the spool, a constant force F is applied as shown. The surface under the block is smooth while beneath the spool is rough. Show that if [...]
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a constant force F is applied as shown. The surface under the block is smooth while beneath the spool is rough. Show that if M=(I)/(r(R-r)) ,
A spool of thread of mass m and moment of inertia I is attached to the block of mass M. Along a horizontal line passing through the centre of the spool ,
find in which direction will the frictional force act? Also find in this case the rate of increase of length 'ab' of the thread at time t after the application of force. (No slipping occurs.) ,
no frictional force will act on the spool. Now suppose M=(2I)/(r(R-r)) ,
If vector a= x1i +y1j & vector b= x2i + y2j. Find the condition that would make vector a & vector b parallel to each other
23
Aug
If vector a= x1i +y1j & vector b= x2i + y2j. Find the condition that would make vector a & vector b parallel to each other If vector a= x1i +y1j & vector b= x2i + y2j. Find the condition that would make vector a & vector b parallel to each other August 23, 2020 [...]
A cube of side a and mass M is pivoted on a horizontal axis such that it can rotate about one of tis edges. Initially it is held in the highest position and then released. Find horizontal and vertical components of reaction of pivot on the cube at the moment when the reaction toward the centre of the cube becomes zero. Given that M.I of the cube about its edge is equal to (2)/(3)Ma^(2).
23
Aug
A cube of side a and mass M is pivoted on a horizontal axis such that it can rotate about one of tis edges. Initially it is held in the highest position and then released. Find horizontal and vertical components of reaction of pivot on the cube at the moment when the reaction toward the [...]
In the figure shown, a solid sphere of mass ‘m’ and radius r is released from a height 6r to slide down a smooth surface. A plank of same mass ‘m’ touches the horizontal portion of the surface at the ground. The co-efficient of friction between the plank and the sphere is mu and that between the plank and the ground is mu//4. Find the work done by the friction force between the plank and the ground till the sphere starts pure rolling on the plank. Neglect the height of the plank.
23
Aug
In the figure shown, a solid sphere of mass ‘m’ and radius r is released from a height 6r to slide down a smooth surface. A plank of same mass ‘m’ touches the horizontal portion of the surface at the ground. The co-efficient of friction between the plank and the sphere is mu and that [...]
if a=2i-3j+2k and b=i+2j+k find (i) a,b, (ii)a x b,and(iii) b x a
23
Aug
if a=2i-3j+2k and b=i+2j+k find (i) a,b, (ii)a x b,and(iii) b x a (ii)a x b and(iii) b x a B if a=2i-3j+2k and b=i+2j+k find (i) a August 23, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A particle strikes a smooth horizontal surface at an angle of 45^(@) with a velocity of 100m//s and rebounds. If the coefficient of restitution between the floor and the particle is 0.57 then the angle which the velocity of the particle after it rebounds will make with the floor is
23
Aug
A particle strikes a smooth horizontal surface at an angle of 45^(@) with a velocity of 100m//s and rebounds. If the coefficient of restitution between the floor and the particle is 0.57 then the angle which the velocity of the particle after it rebounds will make with the floor is A block B is at [...]