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Nastasia [14]
3 years ago
14

Which situation is NOT the result of an unbalanced force acting on an object? A. an object speeds up B. an object maintains spee

d C. an object changes direction
Physics
1 answer:
7nadin3 [17]3 years ago
5 0
Im pretty sure its b........
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If a person walks 3 m north and 5 meters east, how would you find the displacement for that person? what would the displacement
UkoKoshka [18]

Answer:

AC)=(AB)2+(BC)2−−−−−−−−−−−−√=42+32−−−−−−√

⇒displacement=16+9−−−−−√=25−−√=5m

8 0
3 years ago
A student pushed a box 32.0 m across a smooth, horizontal floor using a constant force of 124 N. If the force was applied for 8.
Brilliant_brown [7]

The power developed is 500 W ( to the nearest Watt)

Power(P) is the rate at which work is done. Work done (W) is the product of the force applied on the object and the displacement (s) made by the point of application of the force.

P = \frac{W}{t}

W= F*s

Therefore,

P=\frac{F*s}{t}

Substitute the given values of force , displacement and time

F = 124 N,s = 32.0 m,t = 8.0 s

P =\frac{W*s}{t} =\frac{124N*22.0s}{8.0s} =496 W

Thus the Power can be rounded off to the nearest value of 500 W

3 0
3 years ago
Read 2 more answers
A force of 2N will stretch a rubber band 0.02m. Assuming that Hooke's Law applies, answer the following: How far will a 1600N fo
denis-greek [22]
Hooke's Law states that the extension is directly proportional to the force applied so:
F/x = constant

F₁/x₁ = F₂/x₂
2 / 0.02 = 1600 / x₂
x₂ = 16 m

Elastic work = 1/2 Fx
= 1/2 * 1600 * 16
= 12.8 kJ
7 0
3 years ago
How much heat energy is needed to raise the temperature of 2.06 kg of this oil from 23 °c to 191 °c?
Whitepunk [10]
Q=mc(t2-t1)
Q=2.06kg x specific heat of oil(191-23)
Q=2.06×c×168
Q=143.62q
5 0
3 years ago
You send a beam of light from a material with index of refraction 1.17 into an unknown material. In order to help identify this
Papessa [141]

Answer:

The index refraction of the unknown material is 1.08

Explanation:

Light has characteristics of a wave. When light travels or propagates through two media with different index of refraction, the light will bend or will change its speed. 

Using Snells' law which is stated mathematically as:

n1Sintheta1 = n2Sinthetha2

Given:

n1 = 1.17

Theta1 = 40.1° = angle of incidence

Theta2 = 36.3° = angle of refraction

n2 = unknown

Substituting into the equation

n1Sin40.1 = 1.17Sin36.3°

0.6441n1 = 0.6937

n1 = 0.6937/0.6441

n1 = 1.08

8 0
3 years ago
Read 2 more answers
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