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The coefficient of static friction between the beads and the surface is µs = 0.213. The beads are then given identical charges (magnitude and sign). What is the minimum charge needed to start
Determine the tangential and centripetal components of the net force exerted on a car (by the ground) when its speed is 27m/s, and it has acclerated to this speed from rest in 9.0s on a curve of rad
A speedboat heads west at 112 km/h for 17.0 min. It then travels at 69.0° south of west at 89.0 km/h for 8.0 min. (a) What is the average speed for the trip? (b) What is the average velocity for
a) Find the maximum height above the ground that the rocket reaches b) Find the greatest horizontal range of the rocket beyond point A (point A is located at the base of the incline)
a) Find the distance between the tanks when the round was first fired. b) Find the distance between the tanks at the time of impact.
The masses of the earth and moon are 5.98 x 1024 and 7.35 x 1022 kg, respectively. Identical amounts of charge are placed on each body, such that the net force (gravitational plus electrical) on each
a) Find the magnitude and the direction of the wind velocity b) If the wind velocity is 38 km/h due south, in what direction should the pilot set her course to travel due west? Use the same airspeed
Calculate the frictional force needed for a 900 kg car traveling around a 500 m radius curve at 25 m/s, if the car is to continue moving in a circle and not slide. Assume an unbanked curve.
A uniform electric field of 300 N/C makes an angle of 25o with the dipole moment of an electric dipole. If the potential energy of the dipole is -2.5 × 10-7 J, what is the magnitude of the dip
A proton (m = 1.67 × 10-27 kg, q = e) is sent from far away and impinge directly on a Zirconium nucleus (Q = 40e). The proton's initial speed is 5.0 × 105 m/s. What is the proton's dista
A man used enough energy to go from Aardvark to Beeville. On the first day he traveled 1/3 of the distance. On day two he traveled 1/2 of the remaining distance.
He was supposed to travel due north for 4.8 km, but when the snow clears, he discovers that he actually traveled 7.8 km at 45° north of due east. (a) How far must he now travel to reach base cam
What must the charge (sign and magnitude) of a particle of mass 1.47 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 700 N/C? Use 9.81 m/s^2 for the m
A rock is tossed straight up with a speed of 24 m/s. When it returns, it falls into a hole 9 m deep. What is the velocity of the rock when it hits the bottom of the hole?
A cart is propelled over an xy plane with acceleration components ax = 4.0 m/s2 and ay = -2.0 m/s2. Its initial velocity has components v0x = 8.0 m/s and v0y = 10 m/s. In unit-vector notation, what
If the wire, which is fixed at both ends, vibrates at its fundamental frequency, the sound wave it generates excites the second vibrational mode of the tube of air. What is the tension in the wire?
Find the magnitude and direction (relative to due east) of the displacement that the duck undergoes in 4.0 s while the forces are acting.
When the bungee jumper is reaching the end of his cord, he begins to slow. While slowing down the direction of his velocity is up or down? How about the direction of his acceleration?
A thunderstorm drops half an inch of rain (which is about 1.27cm) on Chicago which covers are area of about 228 square miles (1 mile = 1.609 km) If a typical raindrop is considered to be a sphere wi
A proton moves at 4.40 x 105 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 9.00 103 N/C. Ignore any gravitational effects. (a) Find the time interv
A 2.2 kg ball is dropped from the roof of a building 130 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.0 N on it. (a) How far from the building does the
Sitting in a second-story apartment, a physicist notices a ball moving straight upward just outside her window. The ball is visible for 0.23 as it moves a distance of 1.16 from the bottom to the top
A vector Force (F1) has a magnitude of 2.0 N, and directed due East is exerted on an object. A second force exerted on the object is vector force (F2)= 2.0 N, due north. What is the magnitude and di
A car is travelling alonna highway with a speed of 2.5 m/s when the driver notices an obstruction 1.80 x 10^2m directly ahead. It takes the driver 0.80 sec to react and being braking. a) How far do
Q1. What must the charge (sign and magnitude) of a particle of mass 1.47 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 700 N/C? Use 9.81 m/s^2 for t