3 years ago

A reference point is the object to which we compare another objects motion. true or false?

Physics

1 answer:

const2013 [10]3 years ago

8 0

True I think don’t trust me

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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)

To find: Coefficient of static friction

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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3 years ago

When a cracker or bread dissolves in your mouth, is that a physical or chemical change?

BabaBlast [244]

Physical because ur making dissolve

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2 years ago

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A ray of light is incident on a body x what is the reftactive index

evablogger [386]

Answer:

1.63

Explanation:

If you have the following options:

B. 1.50

C. 1.49

D. 1.33

E. 1.02

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3 years ago

When riding your skateboard you crash into a curb, the skateboard stops, you continue moving forward. Which law of motion is bei

Olenka [21]

You continue moving forward, and you HOPE that some of the other
people in your Physics class are seeing this, because it's a great
demonstration of Newton's First Law of Motion.

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3 years ago

ANSWER IN LESS THAN A MIN!! EASY!

Romashka [77]

Answer:

2 m/sec

Explanation:

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