QUESTION 24 Ball A is thrown downward with a speed of 15 m/s from a height of 50 m. (acceleration due to gravity: 10 m/s4) Ball B is thrown upward with a speed of 15 m/s from a height of 50 m. (acceleration due to gravity: 10 m/s2) Which of the following statements is true? A. Ball A is in the air for longer than Ball B. B. Ball B hits the ground with more speed than Ball A. C. Both Balls hit the ground at the same time. D. Ball A hits the ground with more speed that Ball B. E. Both Ball A and Ball B hit the ground with the same speed.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
(given)
Both balls A and B is thrown upward and downward with a speed =15 m/s from a height = 50 m.
Acceleration due to gravity = 10 m/
The direction of motion while touching the ground will be vertically downwards.
More the kinetic energy,more the speed. Taking the ball earth system, mechanical energy is conserved.
Gain in kinetic energy = loss in potential energy.
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