Question

A tennis ball is thrown upwards from the edge of a cliff with a speed of 10\,\dfrac{\text m}{\text s}10 s m ​ 10, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. It lands on the ground below the cliff 3.03.03, point, 0 seconds later. We can ignore air resistance.

Answer 1

Answer:

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Answer 2

Explanation:

Explanation:

Given A tennis ball is thrown upwards from the edge of a cliff with a speed of 10 m/s. It lands on the ground below the cliff 3.0 seconds later. We can ignore air resistance. Find the displacement of the tennis ball.

• We have initial velocity = 10 m/s
• Final velocity = - 10 m/s
• Acceleration due to gravity = 20 m/s^2
• So from equation of motion we have
•                  v = u + at
•           so   -10 = 10 + (-10) t
•          So – 20 = - 10 t
•          Or t = 2 secs  
• Now we have
• Initial velocity = - 10 m/s
• Time = total time – time taken for first half
•          = 3 – 2
•          = 1 sec
• Now using the equation of motion to find displacement we have,
•   S = ut + ½ at^2
•    S = - 10(1) + ½ x (- 10) (1)^2
•    S = - 10 + (- 5)
•    S = - 10 – 5
• Or S = - 15 m
• Therefore displacement of tennis ball is – 15 m

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https://brainly.in/question/24227298