SATHEE: Kinematics Question 397

Kinematics Question 397

Question: The ball is projected up from ground with speed $30 m / s e c$ . What is the average velocity for time 0 to 4 sec?

Options:

A) $10 m / s e c$

B) $20 m / s e c$

C) $15 m / s e c$

D) $z e r o$

Show Answer

Answer:

Correct Answer: A

Solution:

We should know the displacement in this time.

$= \vec{u} t+ \frac{1}{2} \vec{a} t^{2}$

(We take upward as positive)

$S = 30 \times 4 - 10 \times 4 \times \frac{4}{2} = 40 m .$

The average velocity will be $10 m / s e c$ .

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Kinematics Question 397

Question: The ball is projected up from ground with speed 30m/sec . What is the average velocity for time 0 to 4 sec?

Options:

Answer:

Solution:

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Question: The ball is projected up from ground with speed $30 m / s e c$ . What is the average velocity for time 0 to 4 sec?