We'll assume that the whole scene takes place on Earth.
So the acceleration of gravity is 9.8 m/s² downward.
a). Gravity makes anything fall 9.8 m/s faster every second.
That's the same thing as rising 9.8 m/s slower every second.
If it takes 2.9 seconds to reach its maximum height, then
it must have started out rising at (9.8 x 2.9) = 28.4 m/s.
b). The ball left the bat at 28.4 m/s.
After 2.9 seconds, its speed was zero. (That's why it started falling.)
It's average speed during the climb was
1/2 (28.4 + 0) = 14.2 m/s .
It rose straight up at an average speed of 14.2 m/s for 2.9 seconds,
so it reached a maximum height of
(14.2 x 2.9) = 41.2 meters .
Answer:
A magnetic tape is being played on a cassette deck. The tension in the tape applies a torque to supply reel. Assuming the tension remains constant during playback, the torque varies as the reel becomes empty because the lever arm gets smaller. Therefore, the torque exerted on the reel by the tape becomes smaller.
Explanation:
Inertia increases and the angular momentum is to remain the constant.
Torque =rFsinФ
r=radius
F=force
Ф=angle between the F and lever arm
A person would contact his fellow students and his friends inquiring whether they have encountered the same issue as it is with him.
<h3>What is program?</h3>
The program is a system software which helps students to learn or accomplish any projects.
The class requires a student to use a program that you must download on his computer. He have waited until day 5 of the week to download the program and need it for an assignment that is due in 2 days now. He is having issues with the program.
He must contact his fellow friends and students whether they are facing the same error in starting the program. There are many resources to be used in place of that software. He can also use the internet to find out the troubleshooting methods. He can also contact the software developer and discuss the problems regarding software.
The effective communication can resolve the issues. If no communication is there, no problem is being solved. The person will never understand what other person is facing until and unless he doesn't speak.
Therefore, proper communication and complete details must be shared in order to solve any issue. Any critical problem can be solved even by just discussing.
Learn more about program.
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The answer is to this question is B
Answer:
A. reduces the magnitude of the force required to stop the ball.
C. increases the contact time of the hand with the ball.
D. does neither increase nor decrease the impulse required to stop the ball.
Explanation:
As we know that the force required to stop the ball is given as
here we know that
so we have
now we know that time to stop the ball is increased due to which the force to stop the ball is decreased
so we have correct answer will be
A. reduces the magnitude of the force required to stop the ball.
C. increases the contact time of the hand with the ball.
D. does neither increase nor decrease the impulse required to stop the ball.
