First slide

Instantaneous velocity

Question

A particle is moving along a straight line. At first and fifth second its velocities are 1 m/s and 4 m/s respectively. Then initial velocity of the particle is

Easy

A
2 m/s
B
1 m/s
C
1.5 m/s
D
0.25 m/s

Solution

v=u+at
1= u +a
4= u+5a
a= $\frac{3}{4} m / s^{2}$
thus u= 0.25 m/s

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