Adriver traveling at 22m/s, slows down her 2000kg car to stop for a red light. what work is done by the friction froce against the wheels?
a. -2.2x104 j
b. -4.4x104 j
c. -4.84x105 j
d. -9.68x105 j

C -4.84× 10^5J

Explanation:

Work done = force × distance

v^2 = u^ +2as

u= 22m/s

a =10m/s^2

When the car stops the final velocity (v) =0

0= 22^2 +2×10×s

s = -484/20

s =-24.2m

Work done = force × distance

Force = mass × acceleration

Work done = 2000×10× -24.2

= -4.84×10^5J

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it