What is the average velocity of the particle from rest to 15 seconds? A. 1.1 meters/second B. 1.2 meters/second C. 1.3 meters/se
cond D. 1.4 meters/second
1 answer:
Answer: D. 1.4 meters/second
Explanation:
To calculate average Velocity, the proportion of the total Displacement or distance traveled to the total time taken during that Displacement is calculated.
Total Displacement from rest(that is 0) to 15 seconds (21, on the graph)
(0, 21)
Total time taken = 15 seconds
Average Velocity = (total Displacement / total time taken)
Average Velocity = (21 - 0) / (15 - 0)
Average Velocity = 21 / 15
Average Velocity = 1.4 meters per second
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Answer:
Part a)
Part b)
Part c)
equation of position in x direction is given as
equation of position in y direction is given as
Part d)
Part e)
H = 88.5 m
Part f)
t = 1.2 s
Explanation:
As we know that ball is projected with speed
v = 8.10 m/s at an angle 18 degree below the horizontal
so we will have
Part a)
Since it took t =4 s to reach the ground
so its initial y coordinate is given as
Part b)
components of the velocity is given as
Part c)
equation of position in x direction is given as
equation of position in y direction is given as
Part d)
distance where it will strike the floor is given as
Part e)
Height from which it is thrown is same as initial y coordinate of the ball
so it is given as
H = 88.5 m
Part f)
time taken by ball to reach 10 m below is given as
t = 1.2 s