A weightlifter stands on a bathroom scale. He pumps a barbell up and down. What happens to the reading on the scale as he pumps the barbell up? * O It will decrease since the barbell will exert a net upward force to the lifter. O It will increase since the scale will exert a net upward force to the lifter. O It will decrease since the lifter will exert a net downward force to the scale. O It will increase since the lifter will exert a net upward force to the barbel

Q: What is the spring constant of a spring scale that stretches 1.5 cm when a basket of vegetables of…

A: Spring stretch (x) = 1.5 cm = 1.5 × 10^-2 m  Mass of the basket (m) = 0.25 kg  Let spring constant…

Q: all forces on the free-body diagram of a body can be computed using only equilibrium analysis, the…

A: If all forces on the free body diagram of a body can be computed using only equilibrium analysis ,…

Q: A pair of binoculars has an angular magnification of -5.5, when acting as a telescope (in most…

A: The angular magnification M of binoculars is defined as, M = fo / fe where fo is the effective focal…

Q: What is [(i) + (-i;) + (-k-k) + (k.i)] · (A i +Bj + C k)? * [ O 1 O A+ B + C O -1

A: To find: The value of i.i+-i.j+-k.k+k.i.Ai+Bj+Ck.

Q: A 4 kg block is initially at rest on a frictionless ramp. The block starts 2 meters above the…

A: Given : mass, m = 4 Kg ; Height, h = 2 m  Spring constant , K = 20 N/m  Find : (a) Maximum distance…

Q: You have a telescope with a 105 cm focal length objective. Recall that simple two-element telescopes…

A: Given: Objective focal length of telescope, fo= 105 cm Eyepiece focal length, fe=2.75 cm To…

Q: The meter tape is used to measure projectile's time of flight. Select one: O True O False

A:

Q: How far from a concave mirror (radius 27.2 cmcm ) must an object be placed if its image is to be at…

A:

Q: 1. Draw an open circuit with the following circuit elements: battery, 3 light bulbs, wire, closed…

A: The circuit elements required: 1. Battery 2. 3 light bulbs 3. wire 4. closed switch

Q: If a real image is in front of a mirror, inverted and can be produced on a screen then what would…

A: The image distance always equals the object distance. The size of the image is the same as the…

Q: Given a force F that has magnitude of 240 N, find the angles ex, Oy, 0z that define the direction of…

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Q: Assume the lens-to-retina distance of the human eye is 2.00 cm. Calculate the power P, in diopters,…

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Q: A certain piece of metal "weighs" 5.00 g in air, 3.00 g in water, and 3.24 g in benzene. Determine…

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Q: The formula LA represents the magnetic dipole moment due to a current in closed loop. Select one: O…

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Q: An electromagnetic rail gun uses magnetic forces to launch projectiles. (Figure 1) shows a…

A: When a metal of length L moves with a velocity v in a magnetic field which is perpendicular to the…

Q: One technique of estimating the length of a metal is by recording the time it takes for a pulse to…

A: Given :    Y= 190568780717 N / m² Density = 8534 kg/m³ Time = 0.00297 s L = ?

Q: Find the current density and drift velocity of free electrons when the particles travel on a copper…

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Q: During an ice show an 80.0 kg skater leaps into the air and is caught by an initially stationary…

A:

Q: Lens Separation = 28.02 m So1= 18 m $12 = 5.67 m 30 25 40 45 50 S1= 14.4 m So2 = 13.62 m 1= 8 m ½ =…

A:

Q: The scalar product of vectors A and B is equal to one, therefore * vectors A and B are perpendicular…

A: The scalar product is a technique used in vector calculus. It is a way of multiplying two different…

Q: Activity 11: Network of Capacitors V = 20V Solve for the (a) equivalent capacitance (b) charges a on…

A:

Q: light turns green, a car that has been waiting at an intersection starts ahead with a constant…

A: We know that the distance when an object moving with the constant velocity  velocity =…

Q: surfaces are rough, the two cylinders eventually reach the same angular speed w. Before After (a)…

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Q: mi m2 Two masses are initially moving as shown in the diagram. Mass m1 = 6.80kg and is moving at…

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Q: 14. A sheet of paper can be withdrawn from under the bottle of milk without toppling it if the paper…

A: 14. (C) Inertia Bottle of milk has inertia and hence it will notove unless a big enough force acts…

Q: In uniform circular motion, we have an acceleration and the speed doesn't change. But in projectile…

A:

Q: Is solar energy a challenging forth or bringing forth?

A: solar energy is a challenging forth

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A: Given that: The coil is flat on one side. The other side has 55% of the total mass.

Q: Illustrate and explain how to compute the vector product of two vectors in terms of three…

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Q: 4.0 m 7.0 m 3.0 m =B+ Two forces can be replaced by an equivalent force R acting at point B on the…

A: Given data according to the question Two forces P is replaced by  equivalent force R

Q: A high power lens has: a. a short focal length b. a long focal leng

A: short focal length

Q: The temperature of an iron bar is 360F. It is placed in an oven, after 1 and 2 minutes,…

A:

Q: SITUATION I. Two particles move along the x-axis. Their positions f(t) and g(t) are given: f(t) = bt…

A: The positions f(t) and g(t) are given: f(t)=6t-t2 and  g(t)=t2-4t

Q: 2) A force of 12.0N is applied to a 32.5g wooden block resting against a spring causing it to…

A:

Q: Find the smallest diameter bolt that can be used in the clevis in Fig. 3.2 if P = 415 kN. The…

A: Given, P=415kN Shearing strength=300Mpa

Q: A gun was fired at an angle of 60 degrees above the horizontal. The bullet having an initial…

A: Given:  Initial velocity of bullet = u = 500 m/s Angle at which gun is fired = θ = 60 degrees above…

Q: µF b.2µF c.3µF   d.4µF

A: all three capacitor connected in serise so  C =(3)/(1+1+1)=1uf now c=1+2=3uf

Q: es off a horizontal tabletop with a speed of 2.5 m/s. It strikes the floor in 0.50 Ignore air…

A: We know that the physics book slides off a horizontal tabletop with a speed of 2.5 m/s. It strikes…

Q: A 1.5 kg mass vibrates according to the equation f(x) = 0.75 cos ( 10.5t) Determine the amplitude,…

A: amplitude =0.75m frequency w=2πf f=w/2*3.14 =10.5/2*3.14 =1.67Hz

Q: What is the wavelength (in meters) of a 0.5 kg particle moving with a velocity of 6.63x10-34 m/s?…

A: Given data:  Mass (m) = 0.5 kg Velocity (v) = 6.63×10-34 m/s h = 6.63×10-34 J.s Required: Wavelength…

Q: Direction cosines are also known as D (cos 0, ) i + (cos 0, ) j + (cos 0,) k O F, =| F | cos 0 O cos…

A: Diarection cosine Diarection cosine is the angle between the vector and the three positive…

Q: 6 m 4m 3 m Which of the following correctly defines the 500 N force F that passes from A to B? * O…

A: The correct answer is option (d)

Q: A ship sails from seawater (specific gravity 1.025) into freshwater and therefore sinks slightly.…

A:

Q: We wish to coat flat glass (n = 1.50) with a transparent material (n = 1.23) so that reflection of…

A: Let L is the thickness of the coating, the wave reflected from the back surface travel a distance 2L…

Q: 91 ndidentify the two 28918 the circuits shown. Each circuit has a switch S in the open position.…

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Q: Verify the current and voltage results of the simulation by using Kirchhoff's Rules.

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Q: What is the smallest value of B that can be set - equator to permit a proton of speed 10 m/s to…

A: Here, we calculate  the smallest value of B that can set up at the equator to permit a proton is…

Q: A 400-N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal,…

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Q: An object is placed 15 cm in front of a diverging lens whose focal length is 12 cm. Where will the…

A: Given: The distance of the object from the lens is 15 cm. The focal length of the diverging lens is…

Q: 1. In a given fluid, positive ions, each with three excess protons, move towards right at a steady…

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: