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3 years ago

Use the motion map to answer the question.

Physics

1 answer:

Lana71 [14]3 years ago

3 0

Answer:

The object starts away from the origin and then moves toward the origin at a constant velocity. Next, it stops for one second. Finally, it moves away from the origin at a greater constant velocity.

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A 495-kg dragster accelerates from rest to a final speed of 105 m/s in 395 m, during which it encounters an average frictional f

drek231 [11]

Answer:

Explanation:

According to energy conservation which states that the workdone is equal to change in the system

Workdone = change in kinetic energy + (frictional force * distance)

Workdone = ΔK + fd

Workdone = kf-Ki + fd

Workdone = = 1/2(m(v-u)^2) + fd

Given

Mass m = 495kg

final velocity v = 105m/s

initial velocity = 0m/s

Force f= 1400N

distance d = 395m

Substitute

Workdone = 1/2(495(105-0)^2) + 1400(395)

Workdone = 2,728,687.5+553000

Workdone = 3,281,687.5 Joules

Time = 8.2secs

Power output = Workdone/Time

Power output = 3,281,687.5/8.2

Power output = 885,766.768

Power output = 8.858 * 10^5 watts

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4 years ago

Harnessing the sun's energy to produce heat or electricity is

notsponge [240]

harnessing the sun's energy to produce heat or electricity is : Non-polluting Unlike oil or gas based energy, solar energy create no dangerous emission that is dangerous for our environment. Many scientist believed that solar energy is the answer to the environmental crisis that we currently faced.

4 0

4 years ago

Read 2 more answers

What quantity describes how quickly you change how fast you are traveling or how quickly you change direction?

Margarita [4]

Velocity = The speed and direction that an object is moving at

5 0

3 years ago

Item 19 A student with arms outstretched stands on a platform that is rotating with a constant angular speed. The student then p

nadezda [96]

Answer:

An increase in angular speed due to conservation of energy priciple.

Explanation:

This leads to a decrease in your moment of inertia. This means that your angular velocity must increase as a result of conservation of energy principle and therefore you will spin faster.

It's also the same way this conservation of energy principle applies to ice skaters that makes them spin faster when they suddenly draw their arms inwards.

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3 years ago

All waves must travel up and down. True False

const2013 [10]

Answer:

True all waves that go up must come down

I feel like the follow the rule of gravity:everything that goes up must come d5

8 0

3 years ago