The kinetic energy of an object is given by:
KE = 0.5mv²
KE = kinetic energy, m = mass, v = speed
Given values:
KE = 0.161J, v = 2.33m/s
Plug in and solve for m:
0.161 = 0.5m(2.33)²
m = 0.059kg
The answer is -23.
I hope this will be of use to you
Answer:
α = 1.32 rad/s²
Explanation:
given,
diameter of the bicycle = 0.8 m
radius of the bicycle = 0.4 m
initial speed of the bicyclist,u = 0 m/s
final speed of the bicyclist,v = 22 Km/h = 22 x 0.278
= 6.12 m/s
time,t = 11.6 s
acceleration =![\dfrac{v-u}{t}](https://tex.z-dn.net/?f=%5Cdfrac%7Bv-u%7D%7Bt%7D)
=![\dfrac{6.12-0}{11.6}](https://tex.z-dn.net/?f=%5Cdfrac%7B6.12-0%7D%7B11.6%7D)
=0.53 m/s²
we know,
a = α r
![\alpha=\dfrac{a}{r}](https://tex.z-dn.net/?f=%5Calpha%3D%5Cdfrac%7Ba%7D%7Br%7D)
![\alpha=\dfrac{0.53}{0.4}](https://tex.z-dn.net/?f=%5Calpha%3D%5Cdfrac%7B0.53%7D%7B0.4%7D)
α = 1.32 rad/s²
the angular acceleration of the wheels is equal to α = 1.32 rad/s²
I think it c or d it one I those