Question

50
9.
If velocity v of a particle moving on a straight line
as a function of time t is given as v = 5-t (m/s)
then the distance covered by the particle in first
10 s is
(1) 5 m
(2) 15 m
(3) 25 m
(4) 50 m
​

Answer 1

Answer:

50 m

Explanation:

the particle take u turn at t=5sec ,so in first 5 sec it cover 25/2 and next 5 sec also it cover 25/2.

so total distance is 50 m .

and displacement is 0m.

Answer 2

Answer:

we know that equation of motion

v=dx/dt

v/dt=dx

integration

by limit 0 from10 sec

now

(-t^2/2)limit 10 to 0

x= 100/2= 50 meter

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