Two billiard balls having the same mass and speed roll directly toward each other. What is their combined momentum after they me
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A) 2.02 s
To find the time it takes for the bunny to reach the rocks below the cliff, we just need to analyze its vertical motion. This motion is a free fall motion, which is a uniformly accelerated motion. So we can use the suvat equation:
where
s is the vertical displacement
u is the initial vertical velocity
a is the acceleration
t is the time
For the bunny here, choosing downward as positive direction,
(initial vertical velocity is zero)
s = 20 m
(acceleration of gravity)
And solving for t, we find the time of flight:
B) 14.1 m
For this part, we need to consider the horizontal motion of the bunny.
The horizontal motion of the bunny is a uniform motion with constant velocity, which is the initial velocity of the bunny:
Therefore the distance covered after time t is given by
And substituting the time at which the bunny hits the ground,
t = 2.02 s
We find how far the bunny went from the cliff:
C) 21.0 m/s at below the horizontal
The horizontal component of the velocity is constant during the entire motion, so it will still be the same when the bunny hits the ground:
Instead, the vertical velocity is given by
And substituting t = 2.02 s, we find the vertical velocity at the moment of impact:
So, the magnitude of the final velocity is
And the angle is given by
below the horizontal
Clara is jogging faster during part C of her run.
<h3 /><h3>What is average velocity?</h3>The average velocity of an object is the change in the object's displacement per change in the time of motion.
From the graph of Clara's motion, the average velocity of Clara in part A is calculated as follows;
The average velocity of Clara in part C is calculated as follows;
Thus, we can conclude that Clara is jogging faster during part C of her run.
Learn more about average velocity here: brainly.com/question/6504879
