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3 years ago

A free-falling golf ball strikes the ground and exerts a force on it. Which sentences are true about this situation?

Physics

2 answers:

prohojiy [21]3 years ago

6 0

Hey friends

The answer would be B

~katie

bixtya [17]3 years ago

5 0

Answer:

A. A golf ball striking the ground is a collision.

B. The ground exerts an equal force on the golf ball.

Explanation:

A collision is the mutual interaction between two or more bodies, of which at least one is in motion, with an exchange of momentum and energy.

According to Newton's third law, if the golf ball exerts a force on the ground, then the ground must exert a force of equal magnitude in the opposite direction on the golf ball.

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An ideal gas is brought through an isothermal compression process. The 3.00 mol 3.00 mol of gas goes from an initial volume of 2

ozzi

Answer:

The answers can be found by considering the isothermal expansion equation as well as the ideal gas equation from where we have

The temperature T = 602.64K and the final pressure P = 110.24MPa

Explanation:

Numbeer of moles of gas = 3.00 mol

initial volume = 230.8×10−6 m3

final volume = 133.4×10−6 m3 .

released energy = 8240 J

Temperature = Constant = T

Pressure = $p_{f}$ =unknown

From the relation the combined ideal gas law, PV = nRT

Where R = 8.314 4621.JK−1mol−1

we have The release energy from compression P1V1 -P2V2

-qrev = -nRTln( $\frac{V_{2} }{V_{1} }$ ) = 8240J

n = 3

Hence -nRTln( $\frac{V_{2} }{V_{1} }$ ) = 3×8.314 462×ln $(\frac{133.4}{230.8})$ × T= -8240 J

or -13.67×T = -8240J, thus T = -8240/-13.67 = 602.64K

The Final pressure is given by

PV = n×R×T from where we have V = final volume thus

P = (n×R×T)/V = (3×8.134×602.64)÷(133.4× $10^{-6}$ ) = 110237041.1 N/ $m^{2}$ = 110.237MPa

8 0

3 years ago

Un hombre de pie puede ejercer la misma fuerza con sus piernas tanto en la tierra como en la luna. Sabemos que la masa del hombr

Paul [167]

Answer:

The height jumped by the person on the moon is 6 times the height jumped by the person on earth.

Explanation:

As we know that the acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth.

So, it is false.

Let the mass of man is m and the gravity on moon is g' = g/6.

Let the height jumped on earth is h and the height jumped on moon is h'.

So,

m x g' x h' = m x g x h

g/6 x h' = g x h

h' = 6 h

So, the height jumped by the person is 6 times the height jumped by the person on earth.

6 0

3 years ago

A sprinter has a mass of 80kg and a kinetic energy of 4000 j. What is the sprinter's speed

JulijaS [17]

The formula of the kinetic energy is KE = 0.5*m*v^2.
Given m = 80 kg and KE = 4000 J,
4000 = 0.5*80*v^2
v^2 = 100
v = 10 m/s

4 0

3 years ago

What is air resistance means explain it with free falling body

NikAS [45]

In freely falling body, there is no force acting on it other than the force of gravity (g).

8 0

3 years ago

5 examples of how intertia is used in real life

Mariulka [41]

Answer:

- your body moving forwards when sudden brakes/force is applied e.g. sudden braking in a car

- feeling a backwards force when something moves quickly from rest e.g a bus

- when you stir a cup of tea, it continues to swirl for a short period of time even though you have stopped

- when shaking a tree, it's leaves or fruit fall down

- satellites which move due to the inertia of motion

hope this helped :)

8 0

3 years ago