A car acquires a velocity of `72 km//h` in `10` seconds starting from rest. Find (a) the acceleration (b) the average speed ( c ) the distance travell

Question

A car acquires a velocity of `72 km//h` in `10` seconds starting from rest. Find (a) the acceleration (b) the average speed ( c ) the distance travell

A car acquires a velocity of `72 km//h` in `10` seconds starting from rest. Find (a) the acceleration (b) the average speed ( c ) the distance travelled in this time.
A. 50m
B. 100m
C. 200 m
D. 400m

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
u=0, v=72 km/hr=20m/s
From first equation of motion,
`v=u+at` or `20=0+axx10`
or `a=20//10=2 m//sec^(2)`. From second equation of motion
`s=ut+(1)/(2)at^(2)=0xx10+(1)/(2)xx2xx(10)^(2)`
=100m.

4 views Answered 2023-02-05 15:29