Exam 1: A: Foundations

In the figure,two wooden blocks each of 0.30 kg mass are connected by a string that passes over a very light frictionless pulley. One block slides on a horizontal table,while the other hangs suspended by the string,as shown in the figure.At time t = 0,the suspended block is 0.80 m over the floor,and the blocks are released from rest.After 2.5 s,the suspended block reaches the floor.What is the coefficient of kinetic friction between the table and the sliding block?

From what height above the surface of the earth should an object be dropped to initially experience an acceleration of 0.9200g? The radius of the earth is 6.38 × 10⁶ m.

A certain coin has a diameter of 21.21 mm,a thickness of 1.95 mm,and weighs 0.04905 N.What is its density?

A baseball is located at the surface of the earth.Which statements about it are correct? (There may be more than one correct choice.)

Point P in the figure indicates the position of an object traveling at constant speed clockwise around the circle.Which arrow best represent the direction the object would travel if the net external force on it were suddenly reduced to zero?

You want to design an ideal Carnot heat engine that wastes only 35.0% of the heat that goes into it.The lowest cold-reservoir temperature available to you is +15.0°C.If 150.0 J of work is done per cycle,the heat input per cycle is closest to

A convex lens has a focal length f.An object is placed at a distance between f and 2f on a line perpendicular to the center of the lens.The image formed is located at what distance from the lens?

The angle between vector = 2.00 + 3)00 And vector Is 45.0°. The scalar product of vectors And Is 3.00. If the x component of vector Is positive,what is vector .

Dust particles are pulverized rock,which has density 2500 kg/m³.They are approximately spheres 20 μm in diameter.Treating dust as an ideal gas,what is the root-mean-square speed (thermal speed)of a dust particle at 400°C? (The Boltzmann constant is 1.38 × 10^-23 J/K.)

An object is acted upon by a force that represented by the force vs.position graph in the figure.What is the work done as the object moves (a) from 4 m to 6 m? (b) from 6 m to 12 m?

Four point charges of magnitude 6.00 μC and of varying signs are placed at the corners of a square 2.00 m on each side,as shown in the figure.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²) (a)What is the electric potential (relative to infinity)at the center of this square due to these charges? (b)What is the magnitude of the electric field due to these charges at the center of the square?

As the speed of a moving fluid increases,the pressure in the fluid

In a certain particle accelerator,a proton has a kinetic energy that is equal to its rest energy.What is the speed of the proton relative to the accelerator?

An ac circuit is shown in the figure.The rms current in the circuit is 1.3 A.What is the peak magnetic energy in the inductance?

A 10,000-kg rocket blasts off from earth with a uniform upward acceleration of 2.00 m/s² and feels no air resistance. The upward thrust force its engines must provide during this acceleration is closest to

A car accelerates from 10.0 m/s to 30.0 m/s at a rate of 3.00 m/s². How far does the car travel while accelerating?

A closed,circular loop has a counter-clockwise current flowing through it as viewed by a person on the right,as shown in the figure.If a second closed circular loop with the same radius approaches this loop with constant velocity along a common axis as shown,in what direction will a current flow in the approaching loop as viewed by the person on the right?

A diffraction grating is to be used to find the wavelength of the light in the emission spectrum of a gas.The grating spacing is not known,but a light having a known wavelength of 632.8 nm is deflected by 43.2° away from the central maximum in the second order by this grating.Light of the wavelength to be measured is deflected by 48.2° away from the central maximum in the second order.What is the wavelength of this light?

A metal cylinder of radius 2.0 mm is concentric with another metal cylinder of radius 5.0 mm.If the space between the cylinders is filled with air and the length of the cylinders is 50 cm,what is the capacitance of this arrangement? (k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm.How far from the lens should the object be placed?