PHYSICS COLLEGE

Neglecting air resistance, which statement is not true regarding the energy of the ball? a. The kinetic energy decreases while the ball is going up.
b. The potential energy decreases while the ball is going up.
c. The kinetic energy increases when the ball is coming down.
d. The sum of the kinetic energy and potential energy is constant.
e. The potential energy decreases when the ball is coming down.

Answers

Answer 1
Answer:

Answer:

b. The potential energy decreases while the ball is going up.

Explanation:

Given that we have to neglect the air resistance.

As we know that acceleration due to gravity is in downward direction and it is equal to 10 m/s².

a)

If ball is going up then the velocity of the ball will decreases because the acceleration due to gravity is in opposite to the direction of velocity.That is why kinetic energy of the ball will decreases.

b)

As we know that when we are moving up then the our potential energy is also going to increase.That is why when ball is going to up then potential energy of the ball will increases.

c)

The kinetic energy will increase because the velocity of ball increase.

d)

If there is no any external  resistance force then the summation of kinetic and potential energy will be constant.

e)

When ball is coming to down then potential energy will decreases.

Note - Potential energy = m g h

 Kinetic energy = 0.5 m v²

Option B is correct.


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A 2130 kg car is parked on a hill that makes a 15º angle with the horizontal. What is the normal force on the car?

Answers

Answer:

20573.67N

Explanation:

Given;

mass (m) of the car = 2130kg

angle of inclination Θ = 15⁰

The normal force (F) on the car is given by

F = mgcosΘ

where g is the acceleration due to gravity.

Taking g as 10 and substituting the values of m and Θ into the equation. We have;

F = 2130 x 10 x cos 15⁰

F = 2130 x 10 x 0.9659

F = 20573.67N

Therefore the normal force on the car is 20573.67N

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Answer:

B religious writing

Explanation:

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COLLEGE

Give a precapillary arteriolar pressure of 46 mmHg, a postcapillary venule pressure of 16 mmHg, an intersitial fluid hydrostatic pressure of 1 mmHg, and a plasma oncotic (osmotic) pressure of 25 mmHg, what is the average net pressure of this capillary?

Answers

Answer:

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Explanation:

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This is the pressure that carries blood from the arteries to the veins

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Answers


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Answers

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Answers

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