QUESTION 1 An elevator is descending, slowing down to a stop on a floor of a building. The elevator's cruising speed is 1.8 m/s, and it takes 3.4 s to go from its cruising speed to rest. If a crate weighing 1960 N is loaded on this elevator, what will be the weight of the crate while the elevator is slowing on its descent? Give a numerical value in Newtons.

Q: Question 8 If an electron is emitted from a photoelectric surface of a photoelectric cell with…

A: Given kinetic energy of emitted electron is Kmax=8.5 eV

Q: QUESTION 10 An ideal gas occupies 400 m³ at a pressure of 250 Pa. If the volume is changed to 100 m3…

A: 10. Let the initial pressure of the ideal gas be P1, the initial volume of the ideal gas be V1, the…

Q: B A coin sits on a rotating turntable as shown in the figure. At the time shown in the figure, which…

A: We need to say what the direction of friction will be on the coin on turntable.

Q: (a) How much potential energy does the ball have before it is dropped? 4.39 A 6.0 kg ball is dropped…

A:

Q: 3) Determine the period of oscillation of the spring/mass Spring constant = 280 N/m system to the…

A: (3) Write the formula for the time period of oscillation of the mass-spring.

Q: 1. You want to travel into the future. If your space ship can go at a speed of 2.00 x 10² m/s, how…

A: How long would you have to be gone to return to an Earth five years into the future. Given, speed of…

Q: A 0.4 C charge and a 0.3 charge exert a force of 55 N on each other. How far apart are the charges?

A: (1) Given: Charges q1=0.4 C, q2=0.3 C, Force between the charges F=55 N. Required: Distance between…

Q: 13. Calculate the magnitude of the acceleration of the asteroid, relative to the spaceship. (a)…

A:

Q: In the following diagram, the current passing through 20 Ohm is 1.5 A. 19. What is the current…

A:

Q: Mickey, a daredevil mouse of mass 0.0189 kg, is attempting to become the world's first "mouse…

A: Given: In this question, the given details are, Mickey, a daredevil mouse of mass 0.0189 kg, is…

Q: 12. A golfer drives a ball from its tee. The speed of the ball is 30 ms-1. The mass of the ball is…

A: Given: The speed of the ball is v=30 m/s. The mass of the ball is m=50 g. The contact time between…

Q: An infinitely long wire is uniformly charged. The voltage difference from r 2 m and r= 4 m is 30…

A: Given:    An infinitely long wire --- uniformly charged.    Voltage difference (ΔV) (between r1 = 4m…

Q: 44. (a) What is the equivalent resistance between points A and B? (b) A 276-V emf is connected to…

A:

Q: Problem 10. A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that…

A: For a open orgon pipe antinodes are produced at both end. For a closed orgon pipe antinode produced…

Q: Number 6 please

A: As we know slope of position time graph gives velocity of the body.

Q: An arrangement of source charges produces the electric potential V=5000x2 along the x-axis, where V…

A: Given: Electric potential is V=5000×2 Charged particle is 15 nC Turning points at ±8.4 cm

Q: 3. A particle with mass m and charge q=+1.6× 10C has a speed of v-4.5x10' m/s at point A. It enters…

A: As given in figure the diameter of the semicircle is d=50cm=0.5m Therefore its radius is r=d/2=0.25m…

Q: Three large sheets are separated by equal distances of 15 cm as shown in the figure. The first and…

A: 1. Hence as per the given question,  there are three conducting and non-conducting plates .  which…

Q: Using the letters, match each prefix with the multiplier it represents. V V V V x 10-6 x 106 x 10-3…

A: The given prefix are associated with multiplier as per their definition.

Q: Find the magnitude of the net electric force on the 2 nC charge. The Coulomb constant is 8.98755 x…

A:

Q: 51, please.

A: Given: Potential energy of the stuntman = 10,000 J

Q: 5) Let's use this expression to solve a problem. Star X and Star Y are intrinsically identical…

A: Given, star X is located 20 light-years from earth star Y is located 40 light-years  from earth…

Q: 7. "The wider the road, the more cars can pass through". Which of the following factors affecting…

A: We need to tell which factor affecting the resistance fits the given analogy.

Q: A gymnast of mass 62.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the…

A: Given, The mass of the gymnast, m=62 Kg Acceleration due to gravity, g=9.81 m/s2

Q: Use implicit differentiation to find an equation of the tangent line to the curve at the given…

A:

Q: QUESTION 8 The force is F=7j-3k (N) acts at the position r=4i from the axis of rotation. Determine…

A:

Q: 16. In the figure, a third point charge -q is placed at point P. What is the electric force on -q…

A: Given Three point charges  q , -q, 2q ( as per the fig ) Distance between q and-q = d Distance…

Q: 18) A converging lens has a focal length of 29.0 cm. Find the image distance and the magnification…

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Q: 16) A car is moving at a rate of 30.0 m/s and then starts to accelerate at a rate of 4.0 m/s². What…

A:

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!