Question

A force of N gives a mass m1 an acceleration of 20 m/s2 and a mass m2 an acceleration of 40 m/s2 . What acceleration would it give if both the masses were tied together ?
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Answer 1

Answer:

For mass m

1

newton 2nd law

F=m

1

a

1

5=m

1

×10

m

1

=

2

1

kg

For mass m

2

F=m

2

a

2

5=m

2

×20

m

2

=

4

1

kg

if tied together

Total mass =m

1

+m

2

=

2

1

+

4

1

=

4

3

kg

Now

F=M

T

Q

T

a

T

=

m

T

5

=

3

5×4

=

3

20

m/s

2