Question

Mathematics : Coordinate Geometry
V: 30
DO
(SCIENC
3.
Thoose the correct answer :
An object accelerates from rest to a velocity 30 m/s
in 10 s, then find distance covered by the object
during next 10
(1) 450 m (2) 300 m
(3) 150 m (4) 600 m​

Answer 1

welcome to the concept of kinematics.

in this problem,

given : u= 0 and v= 30 m/s and t= 30 s

we know that

$v = u + at$

then,

$a = (v - u) \div t$

$a = (30 - 0) \div 10 = 3ms { }^{ - 2}$

now distance travelled in next 10 sec

we know

$s = ut + (1 \div 2) \times a t {}^{2}$

$s = 30 \times 10 + (1 \div 2) \times 3 \times 100$

$s = 450m$

yr answer is 1) 450m

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