An object starts at the origin (0,0). It moves for 3 seconds with a constant velocity of vo1 = 2£ + 4ŷ.Then the object moves for 4 seconds at a constant velocity of v12 = -4£ + ŷ. a) Find the position of the object at the end of each time interval. (A: (-10,16)) b) Create a motion diagram c) Create position vs time graphs for x and y d) Create velocity vs time graphs for x and y e) What is the total displacement of the object?(A: – 10£ + 16ŷ m) f) How far has the object travelled? (A: 29.9 m) g) How long has the object been travelling?(A: 7s) h) What is the average speed of the object? (A: 4.27) i) What is the average velocity of the object? (A: – -1.43£ + 2.29ŷ )

Q: Take a boat with a mass of 1.5 kg and lift it to a height of 2m. Compute the amount of work done.

A: Given:Mass,m=1.5 kgHeight,h=2mGravitational acceleration,g=9.81 m/s2Now,Work done,wW=Fdcosθ…

Q: A crate of mass 75 kg is pushed along a floor with a force of 30 N for a distance of 7 m. Calculate…

A: Given data :     Force   =   F    Distance   =   d          To find :            Work done

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A: Work

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Q: If the energy stored in the spring when it was stretched .25 m was used to launch a .1kg ball…

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Q: Suppose that 4 J of work is needed to stretch a spring from its natural length of 36 cm to a length…

A: Suppose that 4 J of work is needed to stretch a spring from its natural length of 36 cm to a length…

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A:

Q: Suppose that 5 J of work is needed to stretch a spring from its natural length of 34 cm to a length…

A: (a) The spring constant can be written as E=12kx2k=2Ex2k=25 J10×10-2cm2k=1000 N/m…

Q: Suppose that 2 J of work is needed to stretch a spring from its natural length of 28 cm to a length…

A:

Q: A crate of mass 78 kg is pushed along a floor with a force of 30 N for a distance of 9 m . Calculate…

A: Mass,m=78 kg. Force, F=30 N. Distance,S=9m.

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Q: Discuss 10 practical ways by which energy can be conserved

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Q: Question   a) A satellite of mass m = 3.6kg orbits the Earth 300km ab ove the Earth's surface. How…

A: Given, A satellite of mass m=3.6kg orbits in a radius of 300km above the Earth's surface.

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Q: satellite is held in orbit by a 1000-N gravitational force. Each time the satellite completes an…

A: Gravitational force (F) = 1000 N Circumference (L) = 80000 km

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Q: A crate of mass 60 kg is pushed along a floor with a force of 18 N for a distance of 3 m. Calculate…

A: Mass ( m ) = 60 kg  Force ( F ) = 18 N  Displacement ( d ) = 3 m

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Q: Why should the angle of swing be small few degrees), or, what would happen if the angle were large?

A: For oscillation of a bob hanging from a thread from a fixed point as shown in diagram below we have.

Q: A book is pushed with a force of 71N which produced a work done of 24J. How far did the book travel?

A:

Q: Use conservative and non-conservative force to create a simple story.

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Q: if a person pushed a box about 5 meter by the force of 50N and the frictional force is 43N,what is…

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Q: A crate of mass 48 kg is pushed along a floor with a force of 20 N for a distance of 8 m. Calculate…

A: Given data :                       Force    =     F                     Distance   =    d         To…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.