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In a physics laboratory experiment, a 6.00 kg box is pushed across a flat table by a horizontal force F.
a) If the box is moving at a constant speed of 0.35m/s and the coefficient of kinetic friction is 0.12. What is the magnitude ofF?b) What is the magnitude of F if the box is speeding of with aconstant acceleration of 0.18m/s2?
An airplane travels a distance 270 m down the runway before taking off. If it starts from rest, moves with a constant acceleration, what is its speed when it takes off
A disk of radius R carries an amount charge +Quniformly distributed over its surface. Be able to find a vectorexpression for the electric field at a point on the axis of thedisk at a distance z from the center.
When a moving car of small mass collides with the stationary car of large mass, after the collision
You are driving to grocery store at 15 m/s .You is 140 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 s. and that your car brakes with constant acceleration. How far are you from the intersection whil..
Sound with a frequency 730 Hz from a distant source passes through a doorway 1.05 m wide in a sound-absorbing wall. Find the number of the diffraction minima at listening positions along a line parallel to the wall
Two forces, vector F 1 and vector F 2, act on the 5.00 kg block shown in the drawing. The magnitudes of the forces are F1 = 48.0 N and F2 = 39.0 N. What is the horizontal acceleration (magnitude and direction) of the block?
A 2000 kg satellite is in a circular orbit of radius 60,000 km from the center of the Earth. Determine the gravitational force on the satellite
A tree is approximated as a 60m tall cylinder with a diameter of 3m. What is the weight of the tree, using p as the unknown density of wood? Calculate the amount of compression of the tree due to gravity.
A big yo-yo (radius 0.2 meters, mass= 20 kg) has a string wrapped about its circumference. If yo-yo falls, how much time does it take to fall 10 m
A typical capacitor in an MP3 player has C = 5 ?F. If a charge ±37 ?C is placed on the plates, what is the voltage across the capacitor?
A 0.79-kg block is hung from and stretches a spring that is attached to the ceiling. What is the mass of the second block
A parallel-plate air-filled capacitor having an area 50 cm^2 and plate spacing 0.5 mm is charged to a potential difference of 500 V. Find a.) capacitance,b.)the magnitude of the charge on each plate,c.)the stored energy, d.)the electric field betw..
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