# The velocity of an object with a mass of #5 kg# is given by #v(t)= 2 t^2 + 9 t #. What is the impulse applied to the object at #t= 7 #?

##### 2 Answers

Mar 13, 2018

#### Answer:

#### Explanation:

**Step 1:**

We know,

Putting

**Step 2:**

Now,

Assuming the object started from rest,

**Step 3: **

From (1) & (2),

Mar 13, 2018

#### Answer:

#### Explanation:

Impulse is defined as change in momentum,i.e

Where,

Now,given velocity-time relationship is

So,

So,