A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. If he hits the ball with a velocity of 7.5 m/s and then
1 answer:
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Answer:
Force, F = 2714.33 N
Explanation:
It is given that,
Diameter of the circular tip, d = 1.2 mm = 0.0012 m
Radius, r = 0.0006 m
Pressure acting on the hammer,
Let F is the force exerted on a nail. It can be calculated using the definition of pressure exerted. Its formula is given by :
F = 2714.33 N
So, the force exerted on a nail 2714.33 N. Hence, this is the required solution.
Answer:
-2.5 m/s²
Explanation:
The acceleration of a body is the change in it's velocity with time.
The change in velocity with time can be obtained as the slope of a velocity time graph ;
Acceleration = (change in velocity / change in time)
Taking the slope :
Change in Velocity = △y = y2 - y1
Change in time = △x = x2 - x1
(10, 15) ; (0, 40)
△y / △x = y2 - y1 / x2 - x1 = (40 - 15) / (0 - 10)
△y / △x = 25 / - 10 = - 2.5 m/s²
C. 16 times
Because depending on this ... (4)^2= 16
And (1)^2 =1
Because depending on this ... (4)^2= 16
And (1)^2 =1