List one example of contact and non contact force

Physics

1 answer:

Savatey [412]3 years ago

5 0

Answer Contact Force =Muscular force ,frictional force ,spring force, normal force, tension force are few examples.

Non-Contact Force= Gravitational force ,electrostatic force, magnetic force and electrochemical force are few examples

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Read the following scenario.

andrew-mc [135]

Answer:

Their experimental design lacks control group

Explanation:

Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)

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2 years ago

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Answer:

Explanation:

Electric flux is defined as the flow of electric field intensity through a given surface.

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$\phi=E.A.cos\ \theta$

where:

E = electric field

A = area

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3 years ago

Train cars are coupled together by being bumped into one another. Suppose two loaded cars are moving toward one another, the fir

tia_tia [17]

Answer:

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$m_2$ = Mass of second car = $2\times 10^5\ kg$

$u_1$ = Initial Velocity of first car = 0.3 m/s

$u_2$ = Initial Velocity of second car = -0.12 m/s

v = Velocity of combined mass

As linear momentum of the system is conserved

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Energy lost is

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