Answer:
Explanation:
Speed of car =22.5miles/hr
U=22.5miles/hour
Applied brake and come to rest
Final velocity, =0
t, =2sec
Given that,
Speed=distance /time
Then,
Distance, =speed, ×time
Converting mile/hour to m/s
Given that
Use: 1 mile= 1600 m, 1 h= 3600s
22.5miles/hour × 1600m/mile × 1hour/3600s
Therefore, 22.5mile/hour=10m/s
Using speed =10m/s
Distance =speed ×time
Distance=10×2
Distance, =20m
The distance travelled before coming to rest is 20m.
Started at 4.30 p.m ,15+45+30=1 hr 30 mins,6.00-1 hr 30 mins=4.30 p.m
Answer:
The speed of driver N is 22.1594 m/s
Explanation:
the solution is in the attached Word file
Answer:
This assertion is false
Explanation:
It can be a said that when snow melts to liquid, then at that phase certain amount of energy was needed to change it from its solid state to liquid. The energy needed is given as:
Q=mL
Where m is the mass of snow.
L is latent heat of fusion.
So when there is the melting of snow from solid to liquid, thermal energy gotten from the surrounding gets absorbed so as to convert it into liquid phase.
