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1. A man pulls a 300 N object across a horizontal surface using a100 N force applied at a 35° angle. What is the normal force? If the object is pulled at constant speed, what is the coefficientof friction?
2. A 5 N block slides down a20° incline at constant speed. What is the frictional force?
A 0.58 kg toy airplane is suspended from the ceiling by a 1.6 m long cord and rotates in a horizontal circle. If the cord makes an angle of 35 degrees with the vertical.
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Suppose that only static friction supplies the centripetal force, & find the radius r of the tyre.
when two charges are separated by a distance d their electric potential energy is equal to u. what would be their
If three 0.8 m fan blades are connected to a motor and accelerated uniformly from rest to 54 rpm in 7 minutes. Determine the angular acceleration of the blades.
The sound source of a destroyer's sonar system operates at afrequency of 22.0 kHZ. The speed of sound in water is 1482 m/s. What is the wavelength of the emitted sound.
The electric potential energy stored in the capacitor of a defibrillator is 68 J, and the capacitance is 120 µF. What is the potential difference across the capacitor plates
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
To a first approximation, the Sun consists of a gas of equal numbers of protons and electrons. The temperature at the center of the Sun is about 10^7 K, Estimate the pressure at the center of the Sun
A bicycle with wheels 48 cm in radius travels down the street with an initial speed of 7.00 m/s. What is the initial angular velocity of the wheels
Charges q and Q are placed on the x axis at x = 0 and x = 2.0m, respectively. If q= -40 pC and Q =+30 pC, determine the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
When a high speed passenger train traveling at 113 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D = 642m ahead.
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