1 Is correct because James is going faster.
2 is correct because a faster speed on a position vs time graph will have a steeper slope
3 is correct as well.
The answer is 4 all of the above
Ek = 6KJ.
In physics, the kinetic energy of a body or object is the one that owns due to its movement and is given by the equation , where m is the mass of the object in kilograms and v is the velocity in m/s.
An object that it has a mass of 30 kilograms and moves with a velocity of 20m/s, its kinetic energy is given by:
The fraction of Oil will be 0.8and block will be 0.95
What is density?
Density is the ratio of Mass of a compound upon Volume of that compound. It's SI unit can be g/cm³, kg/m³.
As we know the Density of water is 997Kg/m³≈1000Kg /m³.
1) Fraction of Oil is
800/1000=0.8
2) Fraction of Block is
950/1000= 0.95.
to learn more about Density click brainly.com/question/1354972
Potential energy = (mass) x (gravity) x (height)
1,568 J = (40 kg) x (9.8 m/s²) x (height)
Divide each side
by 392 Newtons: Height = (1,568 N-m) / 392 N
= 4 meters .