PHYSICS HIGH SCHOOL

Select all that apply.A vector always consists of _____.

A) a force
B) mass
C) size
D) direction

Answers

Answer 1
Answer: C) size and D) direction
Vector quantities possess both size and direction while scalars possess only size.
Answer 2
Answer:

Answer:The correct options are (C)and (D) are correct.

Explanation:

A vector is defined as quantity which have magnitude and direction. it is represented by the arrow whose direction is same as that of the quantity.Fro example : velocity, force, acceleration , work done etc.

Magnitude is a term which means size or extent or importance of something.

From this we can conclude that vectors always consists of direction and size(magnitude). Hence options(C)and (D) are correct.

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A 50 kg ball rolls down the street at 5 m/s.
Calculate the momentum of the ball.

Answers

The momentum of the ball is250 Kgm/s

Given the following data;

  • Mass = 50 kg
  • Velocity = 5 m/s

To find the momentum of the ball;

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. It is a vector quantity and as such has both magnitude and direction.

Mathematically, momentum is giving by the formula;

Momentum = mass\; * \; velocity

Substituting into the formula, we have;

Momentum = 50 * 5

Momentum = 250 Kgm/s

Therefore, the momentum of the ball is250 Kgm/s

Find more information: brainly.com/question/3556616

Answer: 250kg m/s

Explanation: You multiply 50kg and 5m/s to get 250kg m/s

a graph depicts force versus position. what represents the work done by the force over the given displacement?

Answers

The area under the graph. W = f d cos(theta), so you want the number that is force times displacement, which corresponds to the area under the graph.

Describe the difference between the currents that exist in the wires leading to a capacitor when these wires are connected to (a) a DC source and (b) an AC source.

Answers

Answer:

Explanation: In DC circuit, the current will flow for a short time, which is required to charge the capacitor. Once you switch it on, it spikes and the gradually decreases to almost zero (0) as the capacitor becomes fully charged.

In an AC circuit, the circuit acts as if the current is flowing throw the plates whereas is not actually flowing. The circuit acts like the AC is flowing through the capacitor.

The ratio of output power yo input power, in percent, is called

Answers

The ratio of output power to input power for a machine is called the machine's efficiency. It doesn't have to be expressed in percent.

Which of the following is a form of mechanical energy?a. internal energy
c. gravitational potential energy
b. chemical potential energy
d. electrical energy

Answers

Gravitational potential energy is a form of mechanical energy.

What is Gravitational potential energy?

Gravitational potential energy is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field.

If an object is at rest and doesn't involve elastic energy, then mechanicalenergy can be equal to gravitational potential energy.

To learn more about Gravitational potential energy here

brainly.com/question/3884855

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Okay so i believe that potential energy is mechanical but there are two answers with potential energy in it. Its a tough one but I think I would go with gravitational potential energy. Hope this helped!

A car rolls down a hill from rest and reaches a velocity of 18.0 m/s in a distance of 25.0m. Find the acceleration of the cart.

Answers

Answer:

I’m so sorry I tried solving it but I don’t understand it can you explain the question a little bit more ty

Explanation:
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