Zeros are always considered significant digits when they are to the left of the decimal point
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Answer:
Thus, the average velocity is 9.73 m/s.
Explanation:
The velocity is given by the rate of change of position.
initial position, A = (9.2, 3.1) m
final position, B = (72.2, 77.2) m
time, t = 10 s
The velocity is given by
Answer:
a. Work done = 313.92 Joules
b. Work done = 439.49 Joules
Explanation:
Work done = Force x distance
Where: Force = mass x gravity
Thus,
Work done = Force x gravity x distance
The earth's acceleration to gravity = 9.81 m/.
a. The work done as it goes from B to A can be determined as;
work done = 4 x 9.81 x 8
= 313.92 Joules
b. The distance between A and C is the total horizontal distance covered from A to C.
i.e 8 + 3.2 = 11.2 m
The work done as the ball goes from point A to C can be determined as:
work done = 4 x 9.81 x 11.2
= 439.488
work done = 439.49 Joules