The purpose of an air filter is to purify the air around you removing particles such as dust from the air.
Answer:
a. Initial speed is zero from a crouching position...
b... Mass of body * 9.8
Explanation:
Answer:
21.7 seconds.
Explanation:
Woman's velocity relative to train (23 m/s - 22.4 m/s) = 0.6 m/s
Distance woman wants to travel = 13m
To find how long she will take to move 13m relative to the train, take the distance she wants to travel divided by her velocity relative to the train.
(13m)/(0.6 m/s) = 21.6667 seconds or 21.7 seconds.
Therefore, it will take the woman 21.7 seconds to move 13m.
Answer:
750J
Explanation:
Given parameters:
Mass of the object = 0.15kg
Velocity of the object = 100m/s
Unknown:
Kinetic energy of the body = ?
Solution:
The kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;
K.E =
m v²
m is the mass of the body
v is the velocity
Now insert the parameters and solve;
K.E =
x 0.15 x 100² = 750J