Impulse Knowledge-Based Download PDF

Questions

1. 1.

   Two carts with masses of 2.0 kg and 6.0 kg are initially held at rest on a frictionless horizontal surface with a compressed spring between them. When the spring is released, it delivers an impulse of magnitude 18 N·s to the 2.0 kg cart. What is the magnitude of the impulse delivered by the spring to the 6.0 kg cart?

   • A) 6.0 N·s
   • B) 18 N·s
   • C) 36 N·s
   • D) 54 N·s
2. 2.

   A net force delivers an impulse of 48 N·s to an object moving along a straight line, causing its velocity to increase from 2.0 m/s to 14.0 m/s. What is the mass of the object?

   • A) 4.0 kg
   • B) 6.0 kg
   • C) 12.0 kg
   • D) 24.0 kg
3. 3.

   A net horizontal force acting on an object along a straight line has a constant value of 20 N for 3.0 s, after which it immediately changes to -8.0 N for 2.0 s. What is the magnitude of the total impulse delivered to the object over the entire 5.0 s interval?

   • A) 76 N·s
   • B) 60 N·s
   • C) 28 N·s
   • D) 44 N·s
4. 4.

   An object traveling along the positive x-axis has an initial momentum of 40 kg·m/s. If an impulse of 30 N·s is delivered to the object in the positive y-direction, what is the magnitude of its final momentum?

   • A) 50 kg·m/s
   • B) 70 kg·m/s
   • C) 10 kg·m/s
   • D) 25 kg·m/s
5. 5.

   A constant net force of 25 N acts on an object in the direction of its motion, increasing its momentum from 15 kg·m/s to 65 kg·m/s. For how long does this force act on the object?

   • A) 0.50 s
   • B) 2.0 s
   • C) 2.6 s
   • D) 3.2 s
6. 6.

   A net force acting on a cart increases linearly from 0 N to 50 N over a time interval of 4.0 s. What is the magnitude of the impulse delivered to the cart during this interval?

   • A) 25 N·s
   • B) 50 N·s
   • C) 200 N·s
   • D) 100 N·s
7. 7.

   A tennis racket strikes a tennis ball, delivering an impulse of 18 N·s during an interaction time of 0.020 s. What is the magnitude of the average force exerted on the ball by the racket?

   • A) 0.36 N
   • B) 900 N
   • C) 360 N
   • D) 1800 N
8. 8.

   An object with a mass of 2.0 kg moves along a frictionless horizontal surface with an initial velocity of 5.0 m/s. If an impulse of 16 N·s is delivered to the object in its direction of motion, what is its final velocity?

   • A) 8.0 m/s
   • B) 13 m/s
   • C) 18 m/s
   • D) 21 m/s
9. 9.

   A 0.25 kg ball moving horizontally at 20 m/s strikes a vertical wall and rebounds along the same line at 30 m/s in the opposite direction. What is the magnitude of the impulse delivered to the ball by the wall?

   • A) 2.5 N·s
   • B) 5.0 N·s
   • C) 12.5 N·s
   • D) 50.0 N·s
10. 10.

    A constant net horizontal force of 18 N acts on a 4.0 kg cart for a duration of 0.50 s. What is the magnitude of the impulse delivered to the cart?

    • A) 9.0 N·s
    • B) 2.25 N·s
    • C) 36 N·s
    • D) 72 N·s