Question

. If the velocity of a particle is (10 + 2t2) m/s, then the average acceleration of the particle between 2s and 5s is
a. 2 m/s2
b. 4 m/s2
c. 12 m/s2
d. 14 m/s2

Answer 1

Answer:

14m/s2

Explanation:

Velocity when t=2s is v

2

=10+2×4=18m/s

Velocity when t=5s is v

5

=10+2×25=60m/s

so change in velocity will be Δv=60−18=42m/s

time taken is Δt=5−2=3s

so the average acceleration will be a=

Δt

Δv

=

3s

42m/s

=14m/s2

Hope it was helpful

Answer 2

Answer:

hope this will help you