Ultimate Physics Study Guide - Questions & Answers

57:07Lila is a track and field athlete. She must complete four laps around a circular track. The track itself is a 400 meter track and it took her 6 minutes total to complete.Which best describes her speed and velocity? (There are 60 seconds in 1 minute.)Her speed is 4.4 m/s, and her velocity is 0 m/s.Her speed is 1.1 m/s, and her velocity is 0 m/s.Her speed is 0 m/s, and her velocity is 2400 m/s.Her speed is 4.4 m/s, and her velocity is 4.4 m/s.
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Which statement can be supported by using a position-time graph?A negative slope results when an individual is moving away from the origin.A horizontal line on the graph means the individual is moving at a non-zero velocity.A positive slope results when an individual is moving away from the origin.The speed of an individual cannot be determined from this type of graph.Column A should be Time, and Column B should be Position. Column A should be Position, and Column B should be Time. Column A should be Velocity, and Column B should be Speed.Column A should be Speed, and Column B should be Velocity.
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Could you add two vectors and have the sum be smaller in magnitude than one of the vectors?Also, why is it either yes or no?
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What is the direction and speed of an object?
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2. A fish swimming at a constant speed of 18 m/s spots a sta-tionary barracuda. Just as the fish passes the barracuda, thepredator begins swimming with a constant acceleration ofmagnitude 2.2 m/s. The fish and barracuda are moving in thesame direction.(a) How far does the barracuda swim before catching the fish?(b) At what time will this occur? (Hint: Graphing may help youvisualize this problem.)
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4. A 49-N block is pulled by a horizontal force of 50.0 N along a rough horizontalsurface at a constant acceleration of 6 m/s2. What is the coefficient of friction?
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A plane heads due north at an airspeed of 180 km/h. The windis blowing from the west at 60km/h. What is the plane'svelocity with respect to the ground?
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#8. Benny pushes Betty on her skateboard with a force of 150 N. If she accelerates at 3.0 m/s? what is hermass? Type the formula and answer.
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What comes to mind when you think of theword energy?Think of all of the ways that you have heardpeople use that word.
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anyways chile , what yall doing virtual or school ?
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Explain the relationship between citizenship and the right to vote:
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2. Determine the number of significant figures in each of the following:a) 3427 b) 0.00456 c) 123,453d) 172 e) 0.000984 f) 0.502g) 3100.0 x 102 h) 0.0114 x 104 i) 107.2j) 0.0000455 k) 2205.2 l) 30.0 x 10-2m) 0.982 x 10-3 n) 0.0473 o) 650.502p) 3.03 x 10-1 q) 20.4 x 105 r) 1.29s) 0.00565 t) 1362205.2 u) 450.0 x 103v) 1000 x 10-3 w) 546,000 x) 546,000
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Bx = -1.33 m and By = 2.81 m.Find the direction of the vector.
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Forces of 11.9 N north, 19.1 N east, and 14.4 N south are simultaneously applied to a 3.77 kg mass as it rests on a frictionless air table. What is the magnitude of its acceleration?
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QUESTION 5Insomnia is a sleep disorder most characterized bya. chronic problems in getting adequate sleep.b. frequent, reflexive gasping for air.C. potentially troublesome dream enactments.d. sudden and irresistible onsets of sleep during normal waking periods.N
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An example of a Natural electric field is
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What best explains the results of the experiment?In a lab, two identical lab carts (m = 1.0 kg) travel towardeach other, each with a speed of 2 m/s. The cars collide,and one cart moves to the right with a speed of 3 m/sand the other moves left with a speed of 2 m/s.O This experiment did not occur in a closed system.This proves the conservation of momentum sincePAPAO An additional mass was added to one cart, whichexplains the increase in speed.O The increase in speed was due to the kinetic energyfrom one cart transferring to the other.Mark this and returnSave and ExitNextSubmit
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why doesnt food have energy
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Calculate the kinetic energy of a 1500 kg car moving at 42 km/hr.
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A race-car driver achieved a velocity of 53 m/s in 14 seconds after taking off from rest at the starting line. What was the average acceleration during this time?
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If velocity of a particle is given by v=10+2t m/s, the average acceleration between 2 sec and 5 sec is?
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The train took 2 h 30 min to travel 3/5 of a journey at anaverage speed of 96 km/h. If the train would complete thejourney in 4.1 h, what is the train's average speed for theremaining journey?km/h
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A 500 g block of metal absorbs 5016 J of heat when its temperature changes from 20.0C to 30.0C. Calculate the specific heat of the metal.
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