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Which Car Has Traveled Farther After 10 S

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Kinetic Energy

Think about a cannonball flying through the air. When it hits a wooden target, the ball exerts a force on the fibers in the wood, splintering and pushing them apart and creating a hole. Work has to be done to make that hole fibers have to be moved aside, which means that a force must be exerted over the distance they move. When the cannonball hits the wood, it does work, and so a cannonball in flight clearly has the ability to do workthat is, it has energybecause of its motion. This energy of motion is what we call kinetic energy.

You can find countless examples of kinetic energy in nature. A whale moving through water, a bird flying, and a predator catching its prey all have kinetic energy. So do a speeding car, a flying Frisbee, a falling leaf, and anything else that is moving.

Our intuition tells us that two factors govern the amount of kinetic energy contained in any moving object. First, heavier objects that are moving have more kinetic energy than lighter ones: a bowling ball traveling 10 m/s carries a lot more kinetic energy than a golf ball traveling at the same speed. In fact, kinetic energy is directly proportional to mass: if you double the mass, then you double the kinetic energy.

These ideas are combined in the equation for kinetic energy.

In words: Kinetic energy equals the mass of the moving object times the square of that objects speed .

In equation form: kinetic energy = 1/2 x mass x velocity2

In symbols: KE = 1/2 x m x v2

What’s Up: November 2021

No no no you got it all wrong it travel brutal than any human an object of human descent that ever went human history and DNA travel further than anywhere else in the galaxyï¤ Is that not ironic that an electric car company burn all the carbon saved from all of their cars made in 1 PR stunt They should give a a video

Tesla board should brace for Elon Musk impactThe electric-car maker’s CEO mocked the SEC after it asked a court to hold him in contempt for a production targets tweet. His flouting of rules and accuracy has become a serious liability. Itâs time for directors to plan an emergency route in case Musk’s power completely drains. AntonyMCurrie Thats why I donât follow him ReutersBiz AntonyMCurrie No one cares. ReutersBiz AntonyMCurrie Try and do it without him. I dare you. Mind you, he is daring you.

Tesla CEO Elon Musk violated SEC agreement with misleading tweet, agency saysrealDonaldTrump I’d argue that what my public persona tweets is my artistic choice to promote the ‘character’ and can’t be construed with my professional obligations. Iâm not the only one who has paid attention to his erratic behavior! His controversial tweets hurt Tesla performance in stock markets.

‘How embarrassing’: Elon Musk fired back at the SEC in latest fight over Tesla production numbersThe SEC claims Elon Musk violated his settlement with the agency when he tweeted about Tesla‘s 2019 production numbers.

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Questions From Ncert Textbook

Question.1.An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s? Answer.

Question.2.Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. What are Josephs average speeds and velocities in jogging from A to B and from A to C? From A to B Time for A -> B Answer.

Question.3.Abdul, while driving to school, computes the average speed for his trip to be 20 km hr-1. On his return trip along the same route, there is less traffic and the average speed is 30 km K1. What is the average speed for Abduls trip? Answer.

Question.4. A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 ms-2 for 8.0 s. How far does the boat travel during this time? Answer.

Question.5. A driver of a car travelling at 52 km h 1 applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km h-1 in another car applies his brakes slowly and stops in 10 s. On the same graph paper plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied? Answer.

Question.7. A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 ms 2, with what velocity will it strike the ground? Answer.

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