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1. A 65.0 kg object slides down a 30o angle slope from rest at a height of 15.0 m. The coefficient of kinetic friction between the object and the slope surface is 0.15.
(A) What is the object's speed at the bottom of the slope?
(B) If the object continues to slide on the level ground after reaching the bottom, and if the ground's coefficient of friction is the same as the slope, how far will the abject move before stopping?
2. In an explosion, an object breaks down into two pieces, M1 and M2. M2 flies away at 3 times the speed of M1.
(a) What is the mass ration of M1/M2 ?
(b) Which mass has more momentum immediately after the explosion? Which mass has more kinetic energy? Please show your results in detailed calculations.
You have a compound microscope with a barrel of length 163 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.2m is connected to an electric heater which draws 17.0 A on a 120V- line, How much power is dissipated in the cord
Suppose a uniform magnetic field B is applied perependicular to the plane of a semicircular loop of radius R and a current through the loop is I
A meter stick is pivoted at its 50-cm mark but does not balance because of non uniformities in its material that cause its center of gravity to be displaced from its geometrical center. Find the mass of the meter stick and its location of its cente..
While moving down the track at 10.0 m/s, you uniformly accelerate to 27.0 m/s in 10 s. Illustrate what is the average net force that you have applied to the car during the 10 s interval?
Calculate the electric field from four point-charge: +q at -d and -q at -d/2; 2q at d and -2q at d/2 on the z-axis, First calculate the electric potential, and then calculate its radient.
A child and sled with a combined mass of 55.20 kg slide down a frictionless hill that is 7.84 m high at an angle of 26o from horizontal. The acceleration of gravity is 9.80 m/s2. If the sled starts from rest, what is its speed at the bottom of hil..
Two equally charged insulating balls each weigh 0.14 g and hang from a common point by identical threads 30 cm long. The balls repel each other so that the separation between their centers is 6.4 cm. What is the magnitude of the charge on each bal..
For a short time, the path of the plane is described by If the plane is rising with a constant velocity of 10 m/s, determine the magnitudes of the velocity and acceleration
Compute the position, velocity vector and the distance attained by athlete in a long jump event.
Copper wire has a breaking stress of about 3×10^8 N/m2. What is the highest load that can be hung from a copper wire of diameter 0.420 mm.
During physic lecture a lone ant makes it way across the classroom floor in two distinct stages starting from the wastebasket, Calculate the magnitude and direction of the ants resultant displacement vector
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