A ball is thrown vertically upwards. Its distance s from a fixed point

1.	A ball is thrown vertically upwards. Its distance s from a fixed pointvaries with time t according to the following graph. Calculate velocityof projection of the ball.(A) 10 m/s(B) 20 m/s(C) 30 m/s(D) 50 m/s
Answer» Answer: The correct answer is A 10 m/s Explanation: v2=u2−2gh As we know that velocity is the total DISTANCE covered in a certain PERIOD of time. v= d/t where 'd' is distance and 't' is the time period. so applying this formula: As we know that after REACHING maximum height, the velocity of the ball BECOMES zero. Here is the solution: 0=(10)2−2×10×h2 ∴h=20020=10m/s

A ball is thrown vertically upwards. Its distance s from a fixed pointvaries with time t according to the following graph. Calculate velocityof projection of the ball.(A) 10 m/s(B) 20 m/s(C) 30 m/s(D) 50 m/s

Answer»

Answer:

The correct answer is A

10 m/s

Explanation:

v2=u2−2gh

As we know that velocity is the total DISTANCE covered in a certain PERIOD of time. v= d/t

where 'd' is distance and 't' is the time period.

so applying this formula:

As we know that after REACHING maximum height, the velocity of the ball BECOMES zero.

Here is the solution:

0=(10)2−2×10×h2

∴h=20020=10m/s

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A ball is thrown vertically upwards. Its distance s from a fixed pointvaries with time t according to the following graph. Calculate velocityof projection of the ball.(A) 10 m/s(B) 20 m/s(C) 30 m/s(D) 50 m/s​