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What is the strength of the magnetic field required to exactly balance the weight of the proton and keep it moving horizontally?
Find the frequency of small oscillations for a thin homogeneous plate if the motion takes place in the plane of the plate and if the plate has the shape of an equilateral triangle and is suspended (
The electron's acceleration is due to two electric forces parallel to the x axis: , and , which points in the -x direction. Find the magnitudes of (a) the net force acting on the electron and (b) th
A 88000 spaceship comes in for a vertical landing. From an initial speed of 1.00 , it comes to rest in 2.00 with uniform acceleration. What braking force must its rockets provide? Ignore air resist
Ignore the effects of air resistance. The ball reaches its highest point after 1.22s. How high above the ground does the ball go?
A 1900 kg car rounds a curve of radius 70 m banked at an angle of 12°. What is the magnitude of the friction force required for the car to travel at 84 km/h?
A 61 driver gets into an empty taptap to start the day's work. The springs compress 1.8×10-2 . What is the effective spring constant of the spring system in the taptap?
Such a star could be thought of as a giant atomic nucleus. If a star with a mass equal to that of the sun (of mass 1.99 × 10^30 kg) were to collapse into neutrons, what would be the radius of th
A 9.20 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 75.0 kJ during the projectile's ascent. How much higher would the project
A jetliner is moving at a speed of 274 m/s. The vertical component of the plane's velocity is 50.0 m/s. Determine the magnitude of the horizontal component of the plane's velocity.
A 70-N m torque acts on a wheel with a moment of inertia 185 kg m2. If the wheel starts from rest, how long will it take the wheel to make one revolution?
A 124-cm-long, 3.00 string oscillates in its = 4 mode with a frequency of 190 and a maximum amplitude of 5.50 . What is the wavelength in the string?
Find the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a magnitude of 6.4 m/s2. Ignore the effects of air resistance. Take the up
Its motion after the driver sees the police car. Which of the following simplifying assumptions is it reasonable to make in this problem?
A steel wire with mass 21.8 g and length 1.19 m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Compute the linear density of the string, What velocity wave on the st
A 1.35 kg block is attached to a spring with spring constant 15.0 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 33.0 cm/s.
A ball of radius 0.200 m rolls with a constant linear speed of 3.60 m/s along a horizontal table. The ball rolls off the edge and falls a vertical distance of 2.10 m before hitting the floor. What
A 50 N block rests on an adjustable inclined plane; the maximum angle just before it slips is 29o with the horizontal. What is the coefficient of static friction between the block and the plane sur
What is the acceleration of two falling sky divers (mass 103.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
The cliff is 100 m above the flat floor of the desert. Determine how far from the base of the cliff the coyote lands. (c) Determine the components of the coyote's impact velocity.
Two particles each with charge +1.75 µC are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 (a) Determine the electric potential on the y axis at y = 0.680 m.
A cardinal (Richmondena cardinalis) of mass 4.00×10-2kg and a baseball of mass 0.143kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magni
A 160g trick baseball is thrown at 75km/hr. It explodes in flight into two pieces, with a 38g piece continuing straight ahead at 86km/h. How much energy do the pieces gain in the explosion?
The magnetic force on the lower magnet is 3.47 times its weight. Find the magnitude of the force of the lower magnet on the upper magnet.
How fast will each be moving when they collide? (Hint: Consider conservation of energy and of linear momentum.)