Q 7.

Expert-verified
Found in: Page 127

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# Two rubber bands pulling on an object cause it to accelerate at1.2 m/s2.a. What will be the object’s acceleration if it is pulled by fourrubber bands?b. What will be the acceleration of two of these objects gluedtogether if they are pulled by two rubber bands?

a) for the four rubber bands acceleration will be double

b) therefor acceleration is halved when object glued together

See the step by step solution

## Step 1.Given information

here given that when Two rubber bands pulling on an object which cause it to accelerate at

1.2 m/s2 then asked two different situation first one is if four rubber band pulling the object that What will be the object’s acceleration. and second one is that when two of these objects glued together if they are pulled by two rubber bands what will be the acceleration.

## Step 2

a)

here assume that the mass is constant or bands have no mass which means bends are identical and apply same force to object.

Then use the Newton second law which say that force is directly proportional to the acceleration.

Consider the force applied by four rubber bands is 2k N

Hence, for the four rubber bands acceleration will be double

## Step 3

b)

consider that newton second law which say that force is directly proportional to acceleration, consider that the force is same as two rubber bands acceleration but the mass of the objects is double

Therefor, acceleration is halved when object glued together .