Question

Two people push car of 3 seconds. with a combined net of 400N
(i) Calculate the impulse if the car mass of 2900kg
What is change in Velocity​

Answer 1

Time of action:-3s

Force applied:-400N

Impulse:-400+400+400:-1200

Answer 2

CORRECT QUESTION :

Two people push a car of 3 seconds with a combined net of 400N.

(i) Calculate the impulse if the mass of car is 2900 kg.

(ii) What will be the change in the velocity ?

GIVEN :

• Force, f = 400 N.
• Time, t = 3 seconds.
• Mass of a car = 2900 kg.

TO FIND :

• The impulse if the mass of car is 2900 kg.
• Change in the velocity.

SOLUTION :

To find the impulse = J = ?

Using,

Impulse = Force × time.

Impulse = 400 × 3

Impulse = 1200 Ns.

Now,

To find the change in velocity = ?

Change in velocity, $\sf \triangle V \ = \ J/m.$

$\implies \sf \dfrac {1200 \ Ns}{2900 \ kg}$

$\implies \sf 2.42 \ m/s.$

Change in velocity = 2.42 m/s.

•°• Impulse is 1200 Ns and change in velocity is 2.42 m/s.