Answer:
The correct statements are A and E.
Explanation:
This statements will be explained according to the Newton's third law of motion. It states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction (law of action and reaction).
A. You are experiencing a larger acceleration than your friend, but in the opposite direction. True. The forces are equal, but the mass of each individual is different, so the acceleration has to be different too. In this case, the smaller mass (you) has the large acceleration.
B. You are experiencing the same acceleration as your friend, but in the opposite direction. False. The forces are equal but the accelerations are different.
C. You are experiencing a smaller acceleration than your friend, but in the opposite direction. False. You are experiencing a larger acceleration due to the smaller mass.
D. You are experiencing a smaller force than your friend, but in the opposite direction. False. The forces are equal for both masses.
E. You are experiencing the same amount of force as your friend, but in the opposite direction. True.This is what the law states.
F. You are experiencing a larger force than your friend, but in the opposite direction. False. The forces are equal.
Answer:
9.0 m
Explanation:
Let the initial velocity be 'u'.
Given:
Final velocity is half of initial velocity.
Maximum height reached by ball (H) = 12.0 m
Acceleration of the ball is due to gravity (g) = -9.8 m/s²(Downward)
Now, first, we will find initial velocity of the ball using equation of motion given as:
For maximum height, final velocity is 0 as the ball stops at the maximum height temporarily. So,
Also,
Now, plug in all the values and solve for 'u'.
Now, consider the motion of the ball till the velocity reaches half of initial velocity.
So, final velocity (v) =
Now, again using the same equation and finding the new height now. Let the new height be 'h'.
So, equation of motion is given as:
Therefore, the height reached by the ball when velocity is decreased to one-half of the initial velocity is 9.0 m.
Efficiency = (output power) / (input power)
= (3,760 joule/sec) / (4,000 joule/sec)
= 3,760 / 4,000 = 0.94 = 94%
The answer is C. Potential energy
(I learned this in class recently)
Answer:
Is this a true and false statement?
Explanation: