A) Mind you before your reaction time, you had be going at a uniform speed 18m/s, so for the reaction time of 0.5 seconds, you had covered a distance of:
18m/s*0.5s = 9 m
For the second part which involved deceleration, using:
v = u - at, Noting that there is deceleration.
u = 18m/s, v = final velocity = 0, a = -12m/s².
Let us solve for the time.
<span>v = u + at
</span>
0 = 18 - 12*t
12t = 18
t = 18/12 = 1.5 seconds.
Let us compute for the distance covered during the 1.5s
s = ut + 1/2at², a = -12 m/s²
s = 18*1.5 -0.5*12*1.5² = 13.5m
So the total distance covered = Distance covered from reaction time + Distance covered from deceleration
= 9m + 13.5m = 22.5m
So you have covered 22.5m out of the initial 39m.
Distance between you and the dear: 39 - 22.5 = 6.5m
So you have 6.5m between you and the deer. So you did not hit the deer.
b) Maximum speed you still have:
Well through trial and error, if you maintain the same values of deceleration, reaction time, distance between the car and the deer, you could have a speed of 25 m/s and still not hit the deer. Once it is higher than that by a significant amount you would hit the deer.
Answer:
just know that if the volume is reduced by 10 the the pressure is increased by 10
Answer:
3.78 kWh
Explanation:
Power of incandescent bulb = 60 W = 0.06 kW
Power of fluorescent bulb = 15 W = 0.015 kW
Number of hours in a week if each day the light is turned on 12 hours
12×7 = 84 hours
Difference in power
0.06-0.015 = 0.045 kW
Multiplying with the number of hours
Hence, the fluorescent bulb will consume 3.78 kWh less electricity energy than the incandescent bulb.
Answer:1.89 m
Explanation:
Given
Block travels in first second
It is released from rest i.e. initial speed is zero (u=0)
using
where a=acceleration
here acceleration is the component of gravity on incline plane (say )
so
So distance traveled in
So distance traveled in is