# Collision question?

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A: Assuming that block one stops after it collides with block two, what is block two's velocity after impact in m/s?

B: How far does block two travel, d2 in meters, before coming to rest after the collision?

A: Assuming that block one stops after it collides with block two, what is block two's velocity after impact in m/s?

B: How far does block two travel, d2 in meters, before coming to rest after the collision?

##### 2 Answers

#### Answer:

I get

A.

B.

Results rounded to two decimal places.

#### Explanation:

A. Initial velocity of block of mass

During sliding movement impeding force of friction

where

Deceleration produced due to this force

using the kinematic expression

Momentum of mass

Given that first block stops after its collision with second block. Due to Law of conservation of momentum, momentum of second block just after the collision

Velocity of second mass

B. Using (1) for Deceleration due friction also for block

#### Answer:

See below.

#### Explanation:

Calling

Before collision

during the collision

after the collision

Solving

for

Putting values