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A 5.2 g bullet leaves the muzzle of a rifle with a speed of 308 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.75 m long barrel of the rifle?
what are the (a) magnitude and (b) direction of the displacement, the (c) magnitude and (d) direction of the average velocity, and the (e) magnitude and (f) direction of the average acceleration? (G
Two stationary positive point charges, charge 1 of magnitude 3.50 nC and charge 2 of magnitude 2.00 nC, are separated by a distance of 48.0 cm. An electron is released from rest at the point midway
A 69.0 kg person, standing on a diving board, dives straight down into the water. Just before striking the water, her speed is 5.20 m/s. At a time of 1.65 s after she enters the water, her speed is
What is the maximum speed of the electron? What is the amplitude of the electron's position?
Take the mass of the sun to be = 1.99×1030 , the gravitational constant to be = 6.67×10-11 , and the acceleration due to gravity at the earth's surface to be = 9.810 .
If the loop is placed in a uniform magnetic field of magnitude 0.400 T, what is the maximum torque that can act on it? The resistivity of copper is 1.7 10-8 · m.
Your roommate is working on his bicycle and has the bike upside down. He spins the 62.0 -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. What is the
If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop?
A car engine is initially rotating at 185 rad/s. It is then turned off and takes 2.40 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.
The current in a solenoid with 22 turns per centimeter is 0.50 . The solenoid has a radius of 1.6 . A long, straight wire runs along the axis of the solenoid, carrying a current of 15. Find the magn
Two blocks of masses m1=1kg and m2=2kg are connected by a massless cord passing over a massless, frictionless pulley. The pulley is pulled up with a force F=50 N. What is the accelerations of the tw
A hotel elevator ascends 170 m with a maximum speed of 5.0 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. (a) How far does the elevator move while accelerating to full spe
A 65 kg boy and girl use an elastic rope while engaged in a tug of war on an icy, frictionless surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the accelera
A particle with charge travels in a circular orbit with radius 4.68 due to the force exerted on it by a magnetic field with magnitude 1.65 and perpendicular to the orbit. What is the magnitude of th
The coefficient of kinetic friction is 0.25. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by
A plane has an airspeed of 300 . The pilot wishes to reach a destination 600 due east, but a wind is blowing at 90.0 in the direction 60.0 north of east. In what direction must the pilot head the pl
However, after the crate is in motion, a horizontal force of 57 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor.
If the parachutist comes to rest with constant acceleration over a distance of 0.710 m, what force does the ground exerts on her?
A flat (unbanked) curve on a highway has a radius of 220 m. A car rounds the curve at a speed of 38.0 m/s. (a) What is the minimum coefficient of friction that will prevent sliding?
An 670kg car goes from a speed of 24 m/s in 6.0s. What average force is exerted by the brakes over this interval? Take the forward direction as postive.
An airplane is heading due south at a speed of 560 km/h. If a wind begins blowing from the southwest at a speed of 70 km/h (average), calculate the following. (a) the velocity (magnitude and directi
She weighs 555 N. As the drawing shows, she is closer to the left cliff than to the right cliff, with the result that the tensions in the left and right sides of the rope are not the same. Find the
A soccer player kicks a rock horizontally off a 38.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.3 s later, what was the initial speed given to the rock? Assume