Answer:
F = 518.4 KN
Explanation:
From work energy theorem;
Energy = workdone
In this case, Energy is kinetic energy and has a formula ½mv²
Thus;
Fd = ½mv²
We are given;
Mass of car; m = 1600 kg
Speed of car after crash; v = 18 m/s
Distance from dummy to steering wheel; d = 0.5 m
Thus;
½ × 1600 × 18² = F × 0.5
This gives;
800 × 324 = 0.5F
F = 800 × 324/0.5
F = 518400 N
F = 518.4 KN
Answer:
(a). The total sound intensity .
(b). The combined sound level 76.19 dB.
Explanation:
Given that,
Sound level = 75.0 dB
We need to calculate the noise
Using formula of intensity
Put the value into the formula
We need to calculate the sound intensity
(a). We need to calculate the total sound intensity
The total sound intensity
(b). We need to calculate the combined sound level
Using formula of sound level
Hence, (a). The total sound intensity .
(b). The combined sound level 76.19 dB.
Answer:
c) It moves faster at the lowest point in its swing than the other one.
d) It has slightly more energy than the other one.
Explanation:
As we know that the time period of pendulum is given as
so we have time period same so here length L will be same for two pendulums
Now one of the pendulum have larger amplitude
So here one of the pendulum will have more energy stored with it and hence it will have more kinetic energy at its mean position
So we will have
c) It moves faster at the lowest point in its swing than the other one.
d) It has slightly more energy than the other one.
I don't understand what u wanna ask pls make it clear!
Answer:ω = 100000rev/min * 2πrad/rev * 1min/60s = 10 500 rad/s
t = 2 min = 120 s
(a) ω = ωo + at
10500 rad/s = 0rad/s + α*120s
α = 87.3 rad/s²
(b) a_t = αr = 87.3rad/s² * 0.095m = 8.29 m/s²
(c) a_r = ω²r = (10500rad/s)² * 0.095m = 1.04e7 m/s²
which is 1.04e7 / 9.8 = 1.06e6 "g"s
(a little over 1 million "g"s)
31
Explanation: