Question

Analyze and solve the given problems involving impulse and momentum. Show your complete solution.

1). A force of 20,000 N is exerted for 5.00 s, on a 75,000 kg mass. What is the impulse of the force for this 5.00 s ?

2). A force of 6.0O N acts on a 3.00 kg object for 15.0 s.

(a). What is the object's change in momentum?

(b). What is the change in velocity?


3). A 4 N pushes for 10 seconds on a 3 kg object. If the object is originally going 6 m/s, find its final velocity?


4). How long would a 25 N force have to push to give the same final velocity?

Answer 1

Step-by-step explanation:

1) Impulse = Force * Time = 20000 * 5

= 100,000Ns

2) (a) Change in momentum = Impulse = Force * time

= 6 * 15

= 90Ns

(b) Change in velocity = Change in momentum / Mass

= 90 / 3

= 30m/s

3) Change in momentum = Impulse = Force * Time

= 4 * 10 = 40Ns

Change in velocity = Change in momentum / Mass

= 40 / 4 = 10m/s

As the original velocity is 6m/s, final velocity = 6 + 10 = 16m/s

4) To give the same impulse of 40Ns, the 25N force has to push 40/25

= 1.6s