Given that At full power, the same car can accelerate from 0 to 31 mph in time 1.5 s. How long would it take for the car to accelerate from 0 to 62.0 mph.
Energy= integral (P×dt) = Pt
therefore;
Since kinetic energy = 1/2 mv^2 = Pt
1/2m(31)² = 1.5 P
480.5 m = 1.5 P
P = 320.33 m
Using the other scenario
1/2m(62)² = 320.33mt
= 1922 m =320.33 mt
t = 6.0 sec
Answer:
Explanation:Let me tell you the logic you need for this: If the boy hears an echo, this means ... 100 m from a tall building claps his hands and hears an echo 0.6 seconds later. ... you can find the rate of travel (meters travelled per second) dividing the total ... the speed of sound in a hypothetical silent craft
Answer:
4135 kgm/s
Explanation:
From the question,
Change in momentum (I) = mass (m) × change in velocity (Δv)
I = mΔv............................................ Equation 1
I = m(v₂-v₁)...................... Equation 2
Given: m = 827 kg, v₂ = 12 m/s, v₁ = 7 m/s
Substitute these values into equation 2
I = 827(12-7)
I = 827(5)
I = 4135 kgm/s
Answer:
63.36 kJ
Explanation:
Potential energy (PE) is the energy stored within an object, due to the object's position, arrangement or state.
Since the Boulder is now on a height , it has a potential energy
<em>Potential Energy = mass * gravitational acceleration * height</em>
(Assume the gravitational acceleration = 10ms⁻²)
Answer:
<h2>1.5 ohms</h2>
Explanation:
Power is expressed as P = V²/R
R = resistance
V = supplied voltage
Given P = 600W and V = 30V
R = V²/P
R = 30²/600
R = 900/600
R = 1.5ohms
magnitude of its resistance is 1.5ohms