Each of the images below represents a plot. The horizontal axis on each plot rep

Question

Each of the images below represents a plot. The horizontal axis on each plot represents time. The vertical axis represents whichever quantity (position, velocity, acceleration) is being discussed. The origin of each plot is represented by 0, and the function is represented by the colored line B You hold your arm out over a cliff and release a ball from rest. Consider the time from just after the ball leaves your hand to just before it hits the ground, which graph best represents the velocity of the ball as a function of time? (Choose up to be the positive direction.) down. Which graph best represents the acceleration of the cell phone as a function of time? (Choose up to be the positive direction.) the position of the ball as a function of time? (Choose up to be the positive direction and choose the point the cell phone is released as the origin.) You throw a cell phone straight up, and it falls back into your hand. Consider the time from just after the cell phone leaves your hand to just before it hits your hand coming back You hold your arm out over a cliff and release a ball from rest. Consider the time from just after the ball leaves your hand to just before it hits the ground. Which graph best represents A van is driving West at a constant velocity. Which graph best represents the velocity of the van as a function of time? (Choose East to be the positive direction.) Submit Answer Incorrect. Tries 6/10 Previous Tries

Explanation / Answer

1.

Velocity of ball w.r.t. time will be given by:

V = U + a*t

U = initial velocity = 0 m/sec

a = -g = -9.81*t

So,

V = 0 - 9.81*t

Since Velocity is negative and this is an equation of straight line, So

Correct graph will be C.

2.

Acceleration for whole motion will be constant and equal to gravitation acceleration

a = -g = -9.81 m/sec^2

So Correct graph will be F.

3.

From Part 1.

height will be given by:

h = U*t + 0.5*a*t^2

h = 0*t - 0.5*g*t^2

h = -0.5*g*t^2

Since height is negative and it's an equation of quadratic function, So

Correct Graph will be H.

4.

Since Velocity is in west direction and constant, which means velocity will be negative

Given that East is positive, So west is negative

So Velocity is constant w.r.t. time and negative, which means

Correct graph will be F.

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