0.5mv^2 > 0.5*0.15*40*40=120J
24 meters per second
B.
60 milligrams
C.
15 liters
D.
6 joules
The correct answer to the question is D) 6 joules.
EXPLANATION:
As per the question, four measurements are given i.e 24 m/s, 60 mg, 15 L and 6 J.
We are asked to determine the measurement which corresponds to energy.
Energy is measured in various units like joule, erg, electron volt etc.
Joule is the unit of energy in S.I system.
Hence, the correct measurement which corresponds to energy is 6 joules.
All other measurements like 24 m/s, 60 mg and 15 L are not the measurements of energy. These are the measurements of speed, mass and volume respectively.
Inertia is a property of an object that resists changes in motion, and its quantity is directly proportional to the object's mass. Therefore, a shopping cart full of groceries, having a greater mass, will exhibit more inertia than an empty shopping cart.
In physics, inertia refers to the tendency of an object to resist changes in its motion. The greater an object's mass, the greater its inertia, making it harder to start or stop its movement. In comparing a shopping cart full of groceries and an empty one, the cart full of groceries will have a higher mass, thus a greater inertia.
Consider an experiment where you exert the same amount of force on both carts. The full cart would be more resistant to change in motion and would move slower or a shorter distance than the empty one due to the higher inertia it possesses.
The same principle can be applied to a group of students using two carts (A and B) for a one-dimensional collision experiment. Cart B with unknown mass is initially at rest while cart A with known mass moves towards it. Since mass directly influences inertia, if cart B was loaded with materials (like a shopping cart full of groceries), it would be harder to shift its motion than if it were empty.
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Momentum, a physics concept, is the product of mass and velocity of an object. An increase in either mass or velocity will increase an object's momentum. Momentum has the same direction as that of velocity.
Momentum in physics is the product of an object's mass (m) and velocity (v), represented as P=mv. Due to this relationship, if either the mass or the velocity of an object increases, its momentum will also increase. The momentum's direction is the same as the velocity's direction. If the direction of motion changes, the momentum's direction will also change.
Consider a situation where a car bumps into another car in front of it. Both the cars will experience a change in velocity and hence a change in momentum due to the collision. However, taking into account the principle of conservation of momentum, the total momentum before the collision would be equal to the total momentum after the collision, assuming that friction is negligible.
For example, a football player with greater mass running at high velocity will collide with greater impact because of greater momentum. Similarly, a smaller object moving with a high velocity can also achieve high momentum.
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The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.