85 N - 40 N = 45 N
And depending on direction the greater force is being pulled towards
Take a car collision as an example, the more you speed up as means of acceleration, the more force will be on impact.
The whistle you use to call has a frequency of 21 kHz, so you do not recognize it also because your threshold of hearing is only 20 kHz. Since you are unable to hear sounds above this value, you request your friend to blow the whistle and move farther away. The frequency will decrease due to Doppler effect.
Answer:
h = 6.371 m
Explanation:
Data:
Potential Energy = P.E = 1500 J
Mass = m = 24 Kg
Gravity = g = 9.81 m/sec²
Height = h = ?
Solution:
As the formula for the Potential Energy is;
P.E = mgh
Replacing the values in the above equation
1500 = 24 × 9.81 × h
h = (1500)÷(24 × 9.81)
h = 6.371 m
