The answer would be 40 cause 10*4=40
Answer:
B. 560 J
J. 1.2 m
Explanation:
v = Final velocity = 0
u = Initial velocity = 4 m/s
= Coefficient of friction = 0.7
m = Mass of runner = 70 kg
g = Acceleration due to gravity = 
Kinetic energy is given by
The mechanical energy lost is 560 J
Acceleration is given by
From kinematic equations we get
The runner slides for 1.2 m
W=F*D
83J=F*14
83/14=F
5.92N
Answer:
It helps to reduce polution and gasses that damage our good gases and the greenhouse gases. It produces energy from the sun. It is the cleanest way to go!
Explanation:
Given:
Focal length: 5.0 cm
image produced: -10.0 cm
mirror equation: 1/di + 1/do = 1/f
Look for the actual distance of the object from the mirror. Solve for do.
1/do + 1/(-10) = 1/5
1/do = 1/5 + 1/10
1/do = (1/5 * 2/2) + (1/10 * 1/1)
1/do = 2/10 + 1/10
1/do = 3/10
10 = 3do
10/3 = do
3.33 = do
The distance of the object from the mirror, rounded to the nearest centimeter is 3 cm.
