<span>The answer is 6 Joules. The kinetic energy (KE) of an object is the product of half of the mass (m) of the object and the square of its velocity (v²): KE = 1/2m*v². We know that m = 0.75 kg and that v = 4 m/s. Therefore, KE = 1/2 * 0.75 kg * (4 m/s)² = 1/2 * 0.75 kg * 16 m²/s² = 6 kg*m²/s² = 6 J.</span>
Answer:
The velocity is 6 m/s
Explanation:
We use the formula of kinetic energy=
Ec= 1/2 x m x v2
2160 J = 1/2 x 120 kg x v2
v =![\sqrt[n]{x} 2160Joulex2/120kg\\](https://tex.z-dn.net/?f=%5Csqrt%5Bn%5D%7Bx%7D%202160Joulex2%2F120kg%5C%5C)
v= 6m/s
1Joule= 1 kgm2/s2
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.
Answer: - 3.43 m/s^2
Explanation:
1) Acceleration = [change in speed] / [time elpased]
2) Change in speed = final speed - initial speed
Since the car comes to a complete stop, the final speed is 0
3) time = 7 seconds
4) Calculation:
acceleration = [ 0 m/s - 24 m/s] / 7 s = - 24 m/s / 7 s = - 3.43 m/s/s or - 3.43 m/s^2
The negative sign means that the car decelerated.
The deeper you go, the more rock must be supported so the more force is required and the pressure goes up.