# Question #3bb16

##### 4 Answers

If you mean the last problem, the answer is 3) 3.92 m/s^2

#### Explanation:

Forces:

acting on two masses without friction

so

question 3 answer 1

#### Explanation:

Constant velocity means zero acceleration i.e. sum of forces is

or

Q no 11

#### Explanation:

Initial velocity of the car

Applied force

Final velocity of the car

Time taken to change in velocity

Acceleration produced

So by Newton's law the mass of the car

Q No 12

#### Explanation:

Considering the equilibrium of forces in the vertical horizontal direction we can write

Adding [1] and [2] we get