EASY
11th ICSE
IMPORTANT
Earn 100

A 20 g ball hits a wall at 45∘angle with a speed of 15 m/s and rebounds perpendicular to the direction of incidence with the same speed. Find the impulse received by the ball.

Important Questions on Force : Newton's Laws of Motion

EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 22
A 150 g cricket ball moving at a speed of 12 m/s is hit by a bat and turned back at a speed of 20 m/s . The duration of impact is 0.01 s. What is the average force exerted by the bat on the ball?
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 23
A ball of mass 0.5 kg moving with a speed of 2 m/s strikes a rigid wall in a direction perpendicular to the wall and is reflected back after a perfectly elastic collision. If the ball has remained in contact with the wall for 0.5 s, calculate the average force exerted on the ball by the wall.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 24
A child suspends a steel disc in a vertical plane by means of a thread. Then he shoots bullets on the disc by a toy-gun. If the mass of each bullet be 2.0 g and the bullet striking the disc with a velocity of 11 m/s is returning with the same velocity, then what average force is being exerted on the disc? The child is firing 3 bullets per second.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 25
A shell of mass 0.02 kg is fired by a gun of mass 100 kg. The muzzle speed of the shell is 80 m/s. Find the recoil speed of gun.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 26
A uniform shell at rest explodes into three equal parts. Two of the parts fly off perpendicular to each other with velocities 9 m/s and 12 m/s. Find the velocity of the third part.
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 27
A body of mass 1 kg initially at rest, explodes and breaks into three fragments of masses in the ratio 1:1:3. The two fragments of equal masses fly off perpendicular to each other with a speed of 30 m/s each. What is the velocity of the heavier fragment?
EASY
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 28
A projectile of mass  50 kg is shot vertically upwards with a velocity of 100 m/s. After 5 seconds the projectile explodes into two fragments, one of which(mass 20 kg) travels vertically up with a velocity of 150 m/s. What will be the velocity of the other fragment at this moment? g=9.8 m/s2 
MEDIUM
11th ICSE
IMPORTANT
ISC Physics Class XI Part 1>Chapter 9 - Force : Newton's Laws of Motion>NUMERICALS>Q 29

 Determine the magnitude and direction of the combined momentum of the moving spheres shown in the figure by drawing a vector diagram. m1=2 kg, m3=3 kg, v1=6 m/s, v2=4m/s. 

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