Question

Q.13 A boy starts from rest, runs with a uniform
acceleration for 5 s, such that he covers a
distance of 37.5 m in 5 seconds. Calculate
the final velocity if the boy. ​

Answer 1

Answer:

Step-by-step explanation:

The initial velocity travelled is 625m

The accleration is α=10m/s  

2

 

The time is t=5s

Apply the equation of motion

v=u+at

The velocity is v=0+10.5=50m/s.

The distance travelled in the first 5s is

s=ut+  

2

1

​

at  

2

 

=0.5+  

2

1

​

.10.5  

2

=125m

Thedistancetravelledinthefollowing10sis

s  

1

​

=ut  

1

​

=50.10=500m

Thetotaldistancetravelledis

d=s+s  

1

​

=125+500=625m

​

 

Answer 2

Answer:

Answer:

Step-by-step explanation:

The final velocity of the boy will be 7.5 m/s