Chapter 10 – COM, Momentum and Collision
Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 10 - COM, Momentum and Collision
A body of mass 2kg makes an elastic head – on collision another body at rest and continues to move in the original direction with one fourth of its original speed . The mass of the second body which collides with the first body is
22
Oct
A body of mass 2kg makes an elastic head – on collision another body at rest and continues to move in the original direction with one fourth of its original speed . The mass of the second body which collides with the first body is A bomb explodes in air when it has a horizontal [...]
A body of mass m1 moving with a velocity 3m/s collides with another body at rest of m2 . After collision the velocities of the two bodies are 2m/s and 5m/s , respectively , along the direction of motion of m1. The ratio m1/m2 is
22
Oct
A body of mass m1 moving with a velocity 3m/s collides with another body at rest of m2 . After collision the velocities of the two bodies are 2m/s and 5m/s , respectively , along the direction of motion of m1. The ratio m1/m2 is A body of mass m1 moving with a velocity 3m/s [...]
A cannon shell is fired to hit a target at a horizontal distance d. However , it breaks into two parts of mass ratio 1:2 at its height point. The smaller part returns to cannon. The other part (i) will fall at a distance d/2 beyond the target (ii) have eight times the kinetic energy of smaller part (iii) the increase in kinetic energy of system after explosion is 200% (iv) after explosion , heavier part will take more time as compared to smaller part , to strike the ground
22
Oct
A cannon shell is fired to hit a target at a horizontal distance d. However , it breaks into two parts of mass ratio 1:2 at its height point. The smaller part returns to cannon. The other part (i) will fall at a distance d/2 beyond the target (ii) have eight times the kinetic energy [...]
A ball is released from height 80m. When the ball is at height 60m, it explodes in two parts of mass ratio 1:2. One of them moves horizontally with speed 20m/s. The distance between the two pieces on the ground is
22
Oct
A ball is released from height 80m. When the ball is at height 60m, it explodes in two parts of mass ratio 1:2. One of them moves horizontally with speed 20m/s. The distance between the two pieces on the ground is A ball is released from height 80m. When the ball is at height 60m [...]
A bomb of mass 4m, while moving on a parabolic path, explodes at highest point of its path. If breaks into two parts of mass ratio 1:3, smaller part coming to rest. The range of this projectile was 60m in the absence of explosion. The distance of the second part from the point of projection when it strikes the ground is
22
Oct
A bomb of mass 4m, while moving on a parabolic path, explodes at highest point of its path. If breaks into two parts of mass ratio 1:3, smaller part coming to rest. The range of this projectile was 60m in the absence of explosion. The distance of the second part from the point of projection [...]
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A bomb of mass 4m ,
explodes at highest point of its path. If breaks into two parts of mass ratio 1:3 ,
smaller part coming to rest. The range of this projectile was 60m in the absence of explosion. The distance of the second part from the point of projection when it strikes the ground is ,
while moving on a parabolic path ,
A shell is fired from a cannon with a velocity 20m/s at an angle 60^∘ with the horizontal. At the highest point it explodes into three pieces of equal masses . One of the pieces retraces its path to the cannon , the second piece moves vertically up with speed 40m/s , the third piece will move with velocity (immediately after the explosion) 1. 20m/s in a horizontal direction 2. 40m/s at an angle 45^∘ with horizontal in an upward direction 3. 402–√m/s at an angle 45^∘ with horizontal in an upward direction 4. 402–√m/s at an angle 45^∘ with horizontal in the downward direction
22
Oct
A shell is fired from a cannon with a velocity 20m/s at an angle 60^∘ with the horizontal. At the highest point it explodes into three pieces of equal masses . One of the pieces retraces its path to the cannon , the second piece moves vertically up with speed 40m/s , the third piece [...]
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 [...]