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2 years ago

9

Compare your answer to the previous question with your observations in conducting this experiment. Discuss whether energy was co

nserved in your experiment. Was friction negligible

1 answer:

Rudiy272 years ago

4 0

No, Friction was not Negligible. If you push a block on a surface, it will not continue to move unless you are still pushing it.

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3. An object of mass 90 kg travels down a slide.

Zolol [24]

Gpe= 90* 9.81 * 15 = 13243.5 Joules

KE= 13243.5 =1/2 m v^2
v^2= 295.3
v= 17.2 m/s

6 0

3 years ago

A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp th

aleksklad [387]

<u>Answer:</u>

The velocity is 30.279 m/s

<u>Explanation</u>:

Consider the initial speed of the semi-trailer be v

Then, initial kinetic energy = $\frac{1}{2} mv^2$

According to question, the semi-trailer coast along a ramp, which is inclined at an angle of 170, and to a distance of 160m to stop

Change in vertical position = $h=160 \times \sin 17^{\circ}-0$ = 46.779m

Final potential energy of semitrailer = mgh

Applying principle of conservation of energy,

$\frac{1}{2} mv^2$ = mgh

Solving for v, we get $v^2$ = 2gh = 2*9.8*46.779 = 916.8684

$v^2$ = 916.8684

v = 30.279 m/s

Therefore, the velocity is 30.279 m/s

6 0

3 years ago

In economics what goods and services will be produced?

poizon [28]

Answer:A market economy is a system where the laws of supply and those of demand direct the production of goods and services. 1 Supply includes natural resources, capital, and labor. Demand includes purchases by consumers, businesses, and the government. Businesses sell their wares at the highest price consumers will pay.

Explanation:

5 0

2 years ago

F.r.e.e points :]]]

Colt1911 [192]

Ok? I don’t know what you want me to do though

4 0

2 years ago

Read 2 more answers

Scientists want to place a telescope on the moon to improve their view of distant planets. The telescope weighs 200 pounds on Ea

LuckyWell [14K]

Answer:

Explanation:

the weight of the telescope decreases because the moon attract the body with less force as compared to earth due to less gravity as compared to earth

6 0

3 years ago