Answer:
<h3><em>
468,000,000 m/s</em></h3>
Explanation:
According to newtons first law of motion;
Force = mass * acceleration
F = ma
where a = v-u/t
v is the final velocity
u is the initial velocity
t is the time taken
F = m(v-u/t)
Ft = m(v-u)
Given parameters;
F = 910,000N
t = 120m = 120 *60 = 7200secs
m = 1400kg
u = 0m/s
Required parameter
Final velocity v
Substituting the given parameters into the formula to get v;
Ft = m(v-u)
910,000 * 72000 = 1400(v-0)
910,000 * 72000 = 1400v
v = (910,000 * 72000)/1400
v = 910,000 * 720/14
v = 910,000 * 60
<em>v = 468,000,000 m/s</em>
<em></em>
<em>Hence the final velocity of the drag racer is 468,000,000 m/s</em>
Answer:
m v1 = (m + M) v2
v2 = m v1 / (m + M)
v2 = 7 * 74 / (74 + 65)
3.73 m/s
74 kg is too heavy for the cannonball (over 150 lbs)
Answer:
/ Em₀ = 0.30
Explanation:
In this exercise we use the relationship of mechanical energy, kinetic energy and gravitational potential energy
K = ½ m v²
U = mgh
We calculate the mechanical energy at two points
Initial. Lower
Em₀ = K = ½ m v²
Highest finish
= U = mg and
Let's calculate
Em₀ = ½ m 3.6 2
Em₀ = m 6.48
= m 9.8 0.20
= m 1.96
The fraction of lost energy is
/ Em₀ = m 1.96 / m 6.48
/ Em₀ = 0.30
30% sun is converted into potential energy
It has several transformation possibilities
It is transformed into thermal energy of air and spores, since this energy cannot be recovered
Q = I t = 30 x 120 = 3600 C
Answer:
2513.6 W
Explanation:
Acoustic power = sound intensity × area of hemisphere
Sound intensity = 1 W/m^2
Area of hemisphere = 2πr^2 = 2×3.142×20^2 = 2513.6 m^2
Acoustic power = 1 W/m^2 × 2513.6 m^2 = 2513.6 W
