(18.3) / (its angular acceleration). seconds.
Answer:
62.601kJ
Explanation:
We have a force with a horizontal component given by the angle of 15°. So wue can take this component to calculate the total work done, that is,
Our values are,
,
Substituting in Work equation,
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
That crowding resulted in pathological behaviour – in rats and by extension in humans
Answer:
A.
Explanation:
The normal force is always perpendicular to the surface of contact, her weight is always pointing straight down (or towards the center of Earth), and the friction opposes the direction of her motion. Free body diagram A. is the only one that fits properly displays those 3 things.