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spin [16.1K]
3 years ago
15

A football player kicks a ball with a mass of 0.42 kg. The average acceleration of the football was 14.8 m/s².

Physics
2 answers:
Soloha48 [4]3 years ago
7 0
A
Because F=ma and the unit of F is always in N. 
vivado [14]3 years ago
3 0

The answer will be D. 6.22 newtons

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This same car gets pulled over for speeding, and goes from 68 m/s to 0 m/s in 14
Harrizon [31]

Answer:

the acceleration of the car is -4.9m/s2.

the direction is opposite to the actual direction, since the acceleration is negative.

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2 years ago
A spring has a force constant k, and an object of mass m is suspended from it. The spring is cut in half and the same object is
kenny6666 [7]

Answer:

f2/f1 = \sqrt{2}

Explanation:

From frequency of oscillation

f = 1/2pi *\sqrt{k/m}

Initially with the suspended string, the above equation is correct for the relation, hence

f1 = 1/2pi *\sqrt{k/m}

where k is force constant and m is the mass

When the spring is cut into half, by physics, the force constant will be doubled as they are inversely proportional

f2 = 1/2pi *\sqrt{2k/m}

Employing f2/ f1, we have

f2/f1 = \sqrt{2}

3 0
3 years ago
A 5.0-kg box is pulled by a horizontal force F applied to the top of the box. When the box meets a low doorstep, it begins to ro
NARA [144]

Answer:

the required minimum magnitude of the force F is 21 N

Explanation:

Given the data in the question,

m = 5 kg

width  = 60 cm

height = 80 cm

Let force is F represent in the image below,

so when the block about to rotate normal shifted to edge of cube

mg(w/2) = Fh

F = mg(w/2) / h

we know that g = 9.8 m/s²

we substitute

F = (5 × 9.8 ( 60/2)) / 70

F = (5 × 9.8 × 30 ) / 70

F = 1470 / 70

F = 21 N

Therefore, the required minimum magnitude of the force F is 21 N

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2 years ago
Is adequate health care are available to all
tankabanditka [31]

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I think for anyone to answer this we need more info on what you want answered. The Sentence Itself doesn't Make Since To Me

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2 years ago
A scientist heats an unknown substance in a closed system. The graph shows the change in temperature over time.
jeka94

Answer:

A

Explanation:

It's A

8 0
3 years ago
Read 2 more answers
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