A pole cast a shadow of 15 meters long when the angle of elevation of the sun is 61'. If the pole has leaned 15' from the vertical directly toward the sun, what is the length of the pole?

Q: Can a centripetal force ever do work on an object? Yes No

A: Required : Can a centripetal force ever do work on an object?

Q: A bead is sliding frictionlessly in the orbit in the figure. If the bead is released from the height…

A: mgh1-h2=12mv2g4R-2R=12v2v=2gR

Q: A small mass m glides frictionless along the track in a loop as shown. Calculate the minimum height…

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Q: m has a velocity of vx kinetic energy

A: The velocity as, v→=vxi^+vyj^+vzk^. The mathematical relationship for the kinetic energy is given…

Q: Find the work done in moving an object along a curve y=5x^2 from (0,0) to (2,20) through the force…

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Q: During normal gait a person 1.69m tall swings their arm through 40 degrees. Calculate the…

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Q: A 1 042-kg satellite orbits the Earth at a constant altitude of 90-km. (a) How much energy must be…

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Q: As the object moves from point A to point D across the surface, the sum of its gravitational…

A: Given data:  An object moves from point A to D Required: The sum of gravitational potential and…

Q: Answer the following questions True or False A) A centripetal force does not do any work. B)A x B=…

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Q: Two trains travel in order to meet. Answer the following questions for each case. (There are four…

A: Disclaimer: “Since you have asked multiple question, we will solve the first question for you. If…

Q: Determine the reactions at the supports A and D. P=18KN w=30kN/m B Ap 1m 1m C 6m D

A: Solution:-Given that

Q: True or False: "An object at rest has potential energy

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Assume that the answer is between 90 and 270 degrees.What is the arctangent of -8.144?

A: We know that value of tan in third quadrant is positive. hence the angle can not lie in the third…

Q: The location of the final point is now changed and the vector pathlength from the intial to the…

A: Displacement, ∆x=25.0cos233oi^+sin233oj^ m Net force, Fnet→=6.00i^+8.00j^ N Work done:…

Q: roblem 10: A student pushes a baseball of m-8.16 kg down onto the top of a vertical spring that has…

A: It is given that,The mass of the baseball is Compression of the spring is Spring constant, .

Q: Which of the following the SI unit for gravitational kinetic enengy O Work O Wat Joule O Kihigram O…

A:

Q: (a) What are the conditions for a particle to perform uniform circular motion about a fixed point?…

A: Uniform circular motion are often described because the motion of an object during a circle at a…

Q: A 2,000-kg minivan is traveling on level ground at a constant speed of 10 m/s in a circle of radius…

A: Given data: Mass (m) = 2000 kg Speed (v) = 10 m/s Radius of circular path (r) = 50 m Required: Work…

Q: What is the minimum speed needed to clear the loop? Diameter is 15m.

A: Radius = 15/2 = 7.5 m  To complete the loop speed required at bottom  V = √(5gR)

Q: Tom olan llad laoon ob saso doidw al te) 2, A rock is being twirled around in a circle on a…

A: A) Net work done by rope's tension on rock is zero. Because in circular motion angle between Tension…

Q: Consider the figure [20 below: 120 N m-30.0 kg 1-5.00 N d-0.800 m Calculate the total power (in…

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Q: Compare the kinetic energy of a 22,000 kg truck moving at 145 km/h with that of an 83.0 kg astronaut…

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Q: As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly…

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Q: An electric fan rotates at 750.00 revolutions per minute. Consider a point on the blade a distance…

A: The angular velocity is 750 rev/min The point from the centre is at 18cm

Q: Please help me to answer this 2 questions. Please.... Please select TWO options as your correct…

A: Hello. Since you have posted multiple questions , we will solve the first question for you. If you…

Q: centripetal acceleration

A:

Q: (c) What is the gravitational potential energy when the keys were dropped? (d) What is the…

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Q: Physic help! Please help draw the question according to what the question is asking

A: FINAL ANSWER:      So finally we draw the graph of kinetic energy of the baseball.Explanation:

Q: 82. Calculate the gravitational potential energy the system at point A. 83. Compared to the kinetic…

A: we have following data as given in question mass of block m = 2 kg gravitational potential energy at…

Q: 2. Find the angle between the position vectors (from the origin) to the points (3, -4, 0) and (-2,…

A: Let,A=(3,-4,0) B=(-2,1,0) We have to find the angle between these two vector

Q: If the orbital period of an object is the same as the time it takes the Earth to rotate about its…

A: Suppose an object of mass m is following a circular geostationary orbit.If its distance from earth's…

Q: A 1.00-kg book is sliding along a rough horizontal surface. At point A it is moving at 3.5 m/s, and…

A: Given data: Mass of book is, m=1.00 kg. Initial velocity at point A is, vA=3.5 m/s. Velocity at…

Q: If an object is moving in a circle at constant speed, the work done by the centripetal force will…

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Q: Magnitude Direction [0°, 360°). T degrees from the positive x-axis, where 8 €

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Q: How much work is exerted on the block by the gravitational force as it travels from P to Q

A: Given mass (m) of the block= 0.50kg radius of the loop (R)= 12cm=0.12m the block is released from…

Q: (a) Find the dot product of Ā · B A = 2.0 î – 4.0 j +k B = 3.0 î + 4.0 Ĵ+ 10k (b) Find the angle…

A: A·B=(2i-4j+k)·(3i+4j+10k) A·B=6-16+10=0 Hence, Dot product of two vectors are 0.

Q: Q. 9: Find the direction cosines of cartesian coordinates (4, -1, 2).

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Q: What is the scalar product of the following vectors? Show your solution A= 3i +5j - 2k  B= - 4i +…

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Q: A fire hose held near the ground shoots water at a speed of 12.5 m/s. At what angle(s) should the…

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Q: How much energy is required to propel a 60.0 KG person to 45.2 cm vertically? What is the person's…

A: Given that:- Mass, m=60.0 kg Height, h=45.2 cm =0.452 m We know that:- Acceleration due to gravity,…

Q: Indicate the one with more potential energy and explain why. A full plane or an empty plane (both…

A: Let the mass of full plane = M let the mass of empty plane = m Let the height at which the plane is…

Q: show solution A stone is projected with an initial velocity of 20 m/s at 30 deg with the horizontal…

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Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.