Chapter 4 – Laws of Motion
Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s,0
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Nov
Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s,0 Figure shows the position-time graph of a particle of mass 4kg. What is the (a) force on the particle for t4s November 27, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar [...]
A man of mass 70 kg stands on a weighing scale in a lift which is moving.
27
Nov
A man of mass 70 kg stands on a weighing scale in a lift which is moving. A man of mass 70 kg stands on a weighing scale in a lift which is moving. November 27, 2020 Category: Chapter 4 - Laws of Motion , NCERT Exemplar Class 11 , Physics ,
A truck starts from rest and accelerate uniformly with 2ms^−2 . At t = 10 s a stone is dropped by a person standing on the top of the truck (6 m high from ground) . What are the (a) velocity and (b) acceleration of the stone at t = 11 s ? Neglect air resistance .
27
Nov
A truck starts from rest and accelerate uniformly with 2ms^−2 . At t = 10 s a stone is dropped by a person standing on the top of the truck (6 m high from ground) . What are the (a) velocity and (b) acceleration of the stone at t = 11 s ? Neglect air [...]
A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation The speed of the bob at its mean position 1m/s .What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme position (b) at is mean position ?
27
Nov
A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation The speed of the bob at its mean position 1m/s .What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme [...]
A rocket with a lift-off mass 20,000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast.
27
Nov
A rocket with a lift-off mass 20,000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast. 000kg is blasted upwards with an initial acceleration of 5.0ms^−2 . Calculate the initial thrust (force) of the blast. A rocket with a lift-off mass 20 November 27, 2020 Category: [...]
The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle? The mass of the three-wheeler is 400 kg and the mass of the driver is 65 kg.
27
Nov
The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. What is the average retarding force on the vehicle? The mass of the three-wheeler is 400 kg [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body.
27
Nov
A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration of the body. A body of mass 5 kg is acted upon by two perpendicular forces 8 N and 6 N. Given the magnitude and direction of the acceleration [...]
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force?
27
Nov
A constant force acting on a body of mass 3.0 kg changes its speed from 2.0m s^−1 to 3.5m s^ −1 in 25s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force? (a) during its upward motion (b) during its downward motion (c) at the [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ?
27
Nov
A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. How long does the body take to stop ? A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15ms^−1. [...]
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance.
27
Nov
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,