3 years ago

Question 15 of 15

Physics

1 answer:

mars1129 [50]3 years ago

6 0

Answer:

Momentum

Explanation:

-Conservation means that any quantity is kept constant.❌

-Force is product of mass and acceleration.❌

-Impulse is product of force and the period of action of the force.❌

-Momentum is the product of mass of a body and it's velocity.✔️

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Question 10 (1 point)

torisob [31]

Answer:

It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.

Explanation:

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The clouds in the sky appear to be white because the clouds _____?

scZoUnD [109]

D. White is a reflectiom of all colors

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A 25kg chair initially at rest on a horizontal floor requires 165 N force to set it in motion. Once the chair is in motion, a 12

bazaltina [42]

The coefficient of static friction between the chair and the floor is 0.67

Explanation:

Given:

Weight of the chair = 25kg

Force = 165 N (F_applied)

Force = 127 N (F_max)

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The “coefficient of static friction” between a chair and the floor is defined as the ration of maximum force to the normal force acting on the chair

μ_s= $F_{max}/F_{n}$

The F_n is equal to the weight multiplied by its gravity

∴ $F_{n}$ =mg

Thus the coefficient of static friction changes as

μ_s= $F_{max}/mg$

μ_{s} = $=165N/((25kg)\times(9.80 m/s^2 ) )$

= 0.67

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What is the difference between a series circuit and a parallel circuit?

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Parallel has more than one circuit or form of energy

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What momentum does a 70 kg person running 10m/s (a fast sprint) have ?

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Momentum = (mass) x (speed)

Momentum = (70 kg) x (10 m/s)

<em>Momentum = 700 kg-m/s</em>

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