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Zolol [24]
3 years ago
12

Hi hi someone talk to meeeee

Physics
1 answer:
Elina [12.6K]3 years ago
4 0
Hi I’ll talk to you!
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Assuming the earth is a uniform sphere of mass M and radius R, show that the acceleration of free fall at the earth's surface is
zimovet [89]

use Newton's gravitational law and 2nd law .....

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2 years ago
How far (in feet) could a pitcher throw a baseball on flat, level ground if he can throw it at 100mph? (Neglect wind drag and th
ehidna [41]

Answer:

R = 668.19 ft  

Explanation:

given,

speed of the ball thrown by the pitcher = 100 mph

to travel maximum distance θ = 45°

distance traveled by the ball = ?

using formula

1 mph = 0.44704 m/s

100 mph = 44.704 m/s

R = \dfrac{u^2sin2\theta}{g}

R = \dfrac{44.704^2sin2\times 45}{9.81}

R = 203.71 m

1 m  = 3.28 ft

R = 203.71 × 3.28

R = 668.19 ft  

hence, ball will go at a distance of 668.19 ft   when pitcher throw it at 100 mph.

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3 years ago
2. Why is it safer for a car to deform when it crashes into another car?
shepuryov [24]

Answer:

Less impact???

Explanation:

8 0
3 years ago
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The strong crystal structure of an ionic compound is one of the main reasons why ionic compounds have a __________ melting point
Elza [17]
The answer is a because it has a high melting tolerance 
6 0
4 years ago
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What constant horizontal force is required to drag a 5 kg block along a
BARSIC [14]

Answer:

25N

Explanation:

formula=> Frictional force= coefficient of friction x normal reaction

normal reaction is mass x gravity(10N/kg)

so Frictional force= 0.5x5x10

=25N

but that is the Frictional force not the constant force

to get the constant force, subtract the Frictional force from the weight of the block

weight= mass x gravity

= 5x10

= 50N

50N-25N

=25N

5 0
3 years ago
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