A. 4500*sin78=4401 N
b. 4500*cos78 = 935 N
c. this one is from geometry.
Two forces 4500N and 686N with the angle 78+90=168 in btw of them
Net force =
= 3831 N
Answer:
Her speed is 9.8 meter per second
Explanation:
Newton's second law states that acceleration (a) is related with force (F) by:
(1)
Here the only force acting on the firefighter is the weight F=mg so (1) is:
Solving for a:
Now with the acceleration we can use the Galileo's kinematic equation:
(2)
With Vf the final velocity, Vo the initial velocity and Δx the displacement, because the firefighter stars from rest Vo=0 so (2) is:
Solving for Vf
Answer:
9.4 m
Explanation:
This is a projectile motion. The maximum height above the level projection is given by
is the initial velocity, is the angle of projection above the horizontal and is the acceleration of gravity.
The maximujm height above the ground is 1 m + 8.4 m = 9.4 m
Answer:
B on edgen
Explanation:
The water in pot X has more kinetic energy than the water in pot Y.
<span>Discrimination is illegal, but caste system is legal.
So answer: False</span>