<span>h ( t) = h(1 sec) = -16t^2 + 541
so h (2 sec) = -16*(2)^2 + 541 = -64 + 541 = <span>477 ft
Therefore, </span></span>the height of the rock after 2 seconds is 477 feet.
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A. True
It is true that mass is a measure of the quantity of matter in an object.
Answer: 450J
Explanation:
Mass of ball = 1.0kg
kinetic energy = ?
velocity of the ball = 30m/s
Kinetic energy is the energy possessed by a moving object. It is measured in joules, and depends on the mass (m) of the object and the velocity (v) by which it moves
i.e K.E = 1/2mv²
KE = 1/2 x 1.0kg x (30m/s)^2
KE = 0.5 x 1.0 x 900
KE = 450J
(Recall that kinetic energy is equal to potential energy at the top of its ascent)
So, if KE = 450J; PE = 450J
Thus, the potential energy of the ball is 450 joules.
The Poisson's ratio definition is given as the change in lateral deformation over longitudinal deformation. Mathematically it could be expressed like this,
Replacing with our values we would have to,
Therefore Poisson's ratio is 0.1977.
Find the screenshots in the attachment for complete solution. Follow the sequence