3 years ago

A theory is a hyothesis that has been varified by multiple investigations. True or false

Physics

1 answer:

irakobra [83]3 years ago

7 0

<span>A theory is a hyothesis that has been varified by multiple investigations.

true</span>

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A person throws a ball with a force of 140 N that accelerates at 15 m/s? What is the mass of the

mr_godi [17]

Newton's 2nd law

$\tt \sum F=m.a$

input the value:

$\tt m=\dfrac{\Sum F}{a}=\dfrac{140~N}{15~m/s^2}=9.3~kg$

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3 years ago

Why do objects in equilibrium have a net force of 0?

lianna [129]

Answer:

Because there is no net force acting o an object in equilibrium.

Explanation:

When object is in equilibrium (either at rest or moving with constant velocity, the net force acting o it is zero.A vector can only have zero magnitude fall of its components are zero this means that all forces acting on the object are balanced.

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3 years ago

Tyler stands at rest on a skateboard. He has a mass of 120 kg. His friend (m = 60 kg) jumps into his arms at a speed of 2 m/s. I

Andrews [41]

Momentum question. This is an inelastic collision, so

m1v1+m2v2=Vf(m1+m2)
Vf=(m1v1+m2v2)/(m1+m2)=[(120kg)(0m/s)+(60kg)(2m/s)] / (120kg+60kg)
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0.67m/s

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4 years ago

What is the formula for elastic collisions

Setler [38]

Answer:

https://www.gstatic.com/education/formulas2/355397047/en/elastic_collisions.svg

Explanation: