Answer
given,
time of disk stayed a loft = 16.7 sec
height reached = 18.4 m
mass = 72 kg
now work done is equal to change in potential energy



W = 12983.04 J
Positive sign means that work is in the direction of motion.



P = 777.42 Watts
Answer:4.05 s
Explanation:
Given
First stone is drop from cliff and second stone is thrown with a speed of 52.92 m/s after 2.7 s
Both hit the ground at the same time
Let h be the height of cliff and it reaches after time t

For second stone
---2
Equating 1 &2 we get





Answer:
The __law__ conservation
of state that either energy may produced nor destroyed
Answer:
Efficiency = 5%
Explanation:
Given that,
Supplies energy to the bulb = 100 J
Transferred energy by the bulb = 5 J
We need to find the efficiency of the bulb. It can be given by "

So, the efficiency of the bulb is 5%.
The formula to get the velocity is V=D/T. First you need to determine the distance and time at a certain point and plug it into the equation and that will be your velocity at that point. To get it between two points you complete the directions two times and find the average or use the slope formula, slope = rise/run; slope = (y2 - y1) / (x2 - x1).