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Question

Physics Question on speed and velocity

A body moving with uniform acceleration describes 40 m in the first 5 sec and 65 m in next 5 sec. Its initial velocity will be :

A

4 m/s

B

2.5 m/s

C

5.5 m/s

D

11 m/s

Answer

5.5 m/s

Explanation

Solution

Here : \infty , log(1+e)\log (1+e) P=13mnc2VP=\frac{1}{3}\frac{mn{{c}^{2}}}{V} P=13m2n(2c)2VP=\frac{1}{3}\frac{\frac{m}{2}n{{(2c)}^{2}}}{V} Now, PP=2\frac{P}{P}=2 P:P=1:2P:P=1:2 or =F.s=(2i^+4j^).(3j^+5k^)=\overrightarrow{F}.\overrightarrow{s}=(2\hat{i}+4\hat{j}).(3\hat{j}+5\hat{k})