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JEE

Centripetal force

Centripetal force, Class 11, JEE, Laws of Motion, Mains

If the radius of curvature of the path of two particles of same mass are in the ratio 3:4, then to maintain the same centripetal force, the ratio of their velocities will be:

Leave a Comment / Centripetal force, Class 11, JEE, Laws of Motion, Mains / Jay

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student skates

2020, Advanced, Class 11, Conservation of energy, JEE, Work, Energy, and Power

A student skates up a ramp that makes an angle of 30° with the horizontal. He/she starts (as shown in the figure) at the bottom of the ramp with speed v₀ and wants to turn around over a semicircular path xyz of radius R, during which he/she reaches a maximum height h (at point y) from the ground, as shown in the figure. Assume that the energy loss is negligible and the force required for this turn at the highest point is provided by his/her weight only. Then (g is the acceleration due to gravity)

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motorboat

Class 11, JEE, Motion in a straight line, NEET, Relative velocity in 1D

A motor boat moving downstream overcame a raft at a point A; after τ (Tau) min, it turned back and after some time, met the raft again at a distance l = 6 km from point A. Calculate flow of velocity assuming the speed of the boat is constant.

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juggling

Class 11, Equations of motion, JEE, Motion in a straight line, NEET

A juggler is juggling 7 balls simultaneously. If the time gap to pass the ball from one hand to the other is 2 seconds, then find the maximum height attained by each ball.

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Average acceleration

Acceleration, Class 11, JEE, Kinematics in 2D, Motion in a plane, NEET

A particle is moving towards the east with a velocity of 20 m/s. In 20 s, it changes its velocity to 60° north of east. Find its average acceleration.

Leave a Comment / Acceleration, Class 11, JEE, Kinematics in 2D, Motion in a plane, NEET / Jay

Home Ask Doubt Questions Prepare About The coefficient of static friction between a wooden block of mass 0.5 kg and

Class 11, Friction, JEE, Laws of Motion

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. What is the minimum horizontal force (in newtons) that must be applied to the block to keep it adhered to the wall? (take g = 10 m/s²)

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Class 11, Friction, JEE, Laws of Motion

An inclined plane is bent in such a way that the vertical cross-section is given by 𝑦 = 𝑥²/4, where y is in vertical and x in horizontal direction. If the upper surface of this curved plane is rough with coefficient of friction μ = 0.5, determine the greatest vertical height (in cm) at which the block can remain at rest without sliding down the surface.

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