Cengage NEET by C.P Singh
An object , initially at rest , explodes in three fragments. The momentum of two pieces are −3piˆ and −4pjˆ where p is a positive number. The momentum of the third piece (i) will have magnitude 5p (ii) will make an angle tan^−1(4/3) with the x-axis (iii) will make an angle tan^−1(3/4) with the x-axis (iv) will have magnitude 7p
22
Oct
An object , initially at rest , explodes in three fragments. The momentum of two pieces are −3piˆ and −4pjˆ where p is a positive number. The momentum of the third piece (i) will have magnitude 5p (ii) will make an angle tan^−1(4/3) with the x-axis (iii) will make an angle tan^−1(3/4) with the x-axis [...]
A body at rest breaks up into 3 parts. If 2 parts having equal masses fly off perpendicularly each after with a velocity of 12m/s when the velocity of the third part which has 3 times mass of each part is 1. 42–√m/s at an angle of 45^∘ from each body 2. 242–√m/s at an angle of 135^∘ from each body 3. 42–√m/s at 135^∘ from each body 4. 42–√m/s at 135^∘ from each body
22
Oct
A body at rest breaks up into 3 parts. If 2 parts having equal masses fly off perpendicularly each after with a velocity of 12m/s when the velocity of the third part which has 3 times mass of each part is 1. 42–√m/s at an angle of 45^∘ from each body 2. 242–√m/s at an [...]
A particle P moving with speed v undergoes a head -on elastic collision with another particle Q of identical mass but at rest. After the collision
22
Oct
A particle P moving with speed v undergoes a head -on elastic collision with another particle Q of identical mass but at rest. After the collision A particle P moving with speed v undergoes a head -on elastic collision with another particle Q of identical mass but at rest. After the collision October 22, 2020 [...]
When an explosive shell travelling in a parabolic path under the effect of gravity explodes in the mid air, the centre of mass of the fragments will move. 1. vertically downwards 2. along the original parabolic path 3. vertically upwards and then vertically downwards 4. horizontally followed by parabolic path
22
Oct
When an explosive shell travelling in a parabolic path under the effect of gravity explodes in the mid air, the centre of mass of the fragments will move. 1. vertically downwards 2. along the original parabolic path 3. vertically upwards and then vertically downwards 4. horizontally followed by parabolic path A bomb explodes in air [...]
A bomb explodes in air when it has a horizontal speed of 10m/s. It breaks into two pieces A and B of mass ratio 1:2. If A goes vertically up at a speed of 40m/s , the speed of B is
22
Oct
A bomb explodes in air when it has a horizontal speed of 10m/s. It breaks into two pieces A and B of mass ratio 1:2. If A goes vertically up at a speed of 40m/s , the speed of B is A bomb explodes in air when it has a horizontal speed of 10m/s. It [...]
At high altitude , a body explodes at rest into two equal fragments with one fragment receiving horizontal velocity of 10m/s. Time taken by the two radius vectors connecting of explosion to fragments to make 90^∘ is
22
Oct
At high altitude , a body explodes at rest into two equal fragments with one fragment receiving horizontal velocity of 10m/s. Time taken by the two radius vectors connecting of explosion to fragments to make 90^∘ is a body explodes at rest into two equal fragments with one fragment receiving horizontal velocity of 10m/s. Time [...]
A shell is fired from a cannon with a velocity v(m/sec.) at an angle θ with the horizontal direction. At the highest point in its path it explodes into two pieces of equal mass. One of the pieces retraces its path to the cannon and the speed (in m/sec.) of the other piece immediately after the explosion is
22
Oct
A shell is fired from a cannon with a velocity v(m/sec.) at an angle θ with the horizontal direction. At the highest point in its path it explodes into two pieces of equal mass. One of the pieces retraces its path to the cannon and the speed (in m/sec.) of the other piece immediately after [...]
A body of mass 50kg is projected vertically upward with velocity of 100m/s. After 5s this body breaks into 20kg and 30kg. If the 20kg piece travels upwards with 150m/s, then the velocity of other block will be
22
Oct
A body of mass 50kg is projected vertically upward with velocity of 100m/s. After 5s this body breaks into 20kg and 30kg. If the 20kg piece travels upwards with 150m/s, then the velocity of other block will be A body of mass 50kg is projected vertically upward with velocity of 100m/s. After 5s this body [...]
A shell of mass 20kg at rest explodes into two fragments whose masses are in the ratio 2:3. The smaller fragment moves with a velocity of 6m/s. The kinetic energy of the larger fragment is
22
Oct
A shell of mass 20kg at rest explodes into two fragments whose masses are in the ratio 2:3. The smaller fragment moves with a velocity of 6m/s. The kinetic energy of the larger fragment is A shell of mass 20kg at rest explodes into two fragments whose masses are in the ratio 2:3. The smaller [...]
A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m /4 remains stationary. The velocity of the other shell will be
22
Oct
A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m /4 remains stationary. The velocity of the other shell will be A shell of mass m moving with velocity v suddenly breaks into 2 pieces. The part having mass m /4 remains stationary. The velocity of [...]