Question

A ball is thrown vertically upwards with a velocity of 9.8 m/s. Its velocity after 1 second will be

[ Take g = 9.8 ms¯²]
9.8 m/s
19.6 m/s
Zero
2.45 m/s

Answer 1

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GiveN:

• Initial velocity = 9.8 m/s²
• Accleration due to gravity = -9.8 m/s²
• Time taken = 1 s

To FinD:

• Final velocity of the ball?

Step-by-step Explanation:

Using the first Equation of motion,

⇒ v = u + gt

⇒ v = 9.8 + -9.8(1)

⇒ v = 0 m/s

The final velocity is hence 0 m/s.

Note:

• While solving questions of under gravity motions using equations of motion, remember the sign convection to avoid mistakes.
• You can consider positive above the ground and negative for towards it.