Answer:
The kinetic energy gained by the air molecules is 0.054313 J.
Explanation:
Given that,
Mass of a coffee filter, m = 1.4 g
Height from which it is dropped, h = 4 m
Speed at ground, v = 0.9 m/s
Initially, the coffee filter has potential energy. It is given by :
Finally, it will have kinetic energy. It is given by :
The kinetic energy Kair did the air molecules gain from the falling coffee filter is :
So, the kinetic energy Kair did the air molecules gain from the falling coffee filter is 0.054313
.
Answer:
a) t = 4.14 s
b) Speed with which it hits the ground = 40.58 m/s
Explanation:
Using the equations of motion,
g = 9.8 m/s², y = H = 84 m,
Initial velocity, u = 0 m/s,
final velocity, v = ?
Total Time of fall, t = ?
a) y = ut + gt²/2
84 = 0 + 9.8t²/2
4.9t² = 84
t² = 84/4.9
t = 4.14 s
b) v = u + gt
v = 0 + (9.8 × 4.14)
v = 40.58 m/s
Answer:
none
Explanation:
it's to high up to be affected by the gravity
Answer:
7056 kJ
Explanation:
Given that,
Mass of a ship roller coaster is 36,000 kg.
It reaches a height of 20 m off the ground
We need to find the gravitational potential energy does it have. The formula for the gravitational potential energy ios given by :
E = mgh
g is acceleration due to gravity
E = 36,000 kg × 9.8 m/s² × 20 m
= 7056000 J
or
E = 7056 kJ
So, it will have 7056 kJ of gravitational potential energy.
Complete Question
The complete quetion is shown on the first uploaded image
Answer:
Explanation:
From the question we are told that
The mass of the fly is 
The extension of the web is 
The spring constant is mathematically evaluated as
substituting values
The frequency of vibration is
substituting values
