Answer:
The distance that person walked: sqrt(6.25^2+15.5^2) = ~16.71
The power that person exerted:
P = F x S / T = [67.5 x 10 /(15.5/16.71)] x 16.71 / 12.3 = ~988.59 W
(Here, g = ~ 10m/s2)
Answer:
3924 N
5124 N
4004 N
2884 N
4004 N
Explanation:
m = Mass of elevator = 400 kg
g = Acceleration due to gravity = 9.81 m/s²
a = Acceleration
f = Friction force = 80 N
When the elevator is stationary only the acceleration due to gravity will be acting on it
Tension
The tension is 3924 N
The balanced force equation would be
The tension is 5124 N
When velocity is constant acceleration is zero
The tension is 4004 N
The tension would be 2884 N
When velocity is constant acceleration is zero
The tension is 4004 N
It depends on what the model looks like, we cant solve it when th model is not present
Answer:a device for calibrating thermometers at the boiling point of water at a known height above sea level or for estimating height above sea level by finding the temperature at which water boils.
Explanation:
Work is the force done to an object to bring about a displacement of the object.
when the block is being moved there are 2 forces acting on the block.
the force applied acts on the block in one direction bringing about its displacement in that direction. Theres another force called frictional force which acts against the movement of the block in the opposite direction to the direction in which the block is moving.
The resultant force acting on the block is ;
F = force applied - frictional force
frictional force - coefficient of friction *mg
mg - mass * gravitational acceleration
mg = 1 kg * 9.8 ms⁻²
= 9.8 N
frictional force = 0.5 * 9.8 N
= 4.9 N
resultant force = 20 N - 4.9 N
= 15.1 N
work done = force * distance moved
= 15.1 N * 3 m
= 45.3 J