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A spring hangs vertically. A 500 g mass is then hung on the spring, which stretches the spring 1.3 cm. Calculate the spring constant in units of N/m.
A cubical box that has been constructed from uniform metal plate of negligible thickness. The box is open at the top and has edge length L = 36 cm. Find (a) the x coordinate, (b) the y coordinate, a
What is the force felt by the electrons and the nuclei in the rod when the external field described in the problem introduction is applied? (Ignore internal fields in the rod for the moment.)
During an all-night cram session, a student heats up a (0.6 10-3 m3) glass (Pyrex) beaker of cold coffee. Initially, the temperature is 18°C, and the beaker is filled to the brim.
The gravitational force between two sumo wrestlers just before they collide r=0.025 m is 2.77x10^-3 N if one wrestler has a mass of 157 kg, what is the mass of the other wrestler?
A mass of 355 g connected to a light spring of force constant 23.7 N/m oscillates on a horizontal, frictionless track. The amplitude of the motion is 5.9 cm. Calculate the total energy of the system
Find the wave speed for a transverse wave on a 5 m long clothes line with a mass of .2 kg ( for the whole 5 m) with a tension 160 N
A daredevil decides to jump a canyon. Its walls are equally high and 11 m apart. He takes off by driving a motorcycle up a short ramp sloped at an angle of 24°. What minimum speed must he have i
A 5.70 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process.
A tennis player receives a shot with the ball .06 kg traveling horizontally at 50 m/s and returns the shot with the ball traveling horizontally at 40 m/s in the opposite direction. what is the impu
A billiard ball moving at 5.00m/s strikes a stationary ball of the same mass. After the collisions, the fist ball moves at 4.33m/s and at an angle of 30.0 degree with respect to the original line o
An ocean liner leaves New York City and travels 19.2 ° north of east for 186 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the shi
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. How much force must you exert to keep the pole motionless in a horizontal position?
A 3.00 x 102-kg piano is being lifted at a steady speed from ground level straight up to an apartment 10.00 m above the ground. The crane that is doing the lifting produces a steady power of 4.00 x
Calculate the force of gravity between a human child (mass = 32 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m).
A car is driven around a curve with a radius of 0.320 km and the car has a speed of 28 m/s. What is the centripetal acceleration?
A submarine dives 100.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of the submarine's displacement? (Assume that upward and the direction of the
A 5 kg steel ball strikes a wall with a speed of 10.7 m/s at an angle of 59° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.151 s,
A 63 kg boy and a 47 kg 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 acceleration of
A girl on a sled coasts down a hill. Her speed is 7.6 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between the sled's runners and the hard, icy snow is 0.040,
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, what would be the recoil speed of the thorium nucleus?
(a) what is velocity of the two objects after collision? (b) How much kinetic energy is transferred to object B during the collision?
It has been suggested that rotating cylinders about 8mi long and 6.1mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripital accel
How long is the bullet in the target? What average force does the bullet exert on the target? What is the target's speed just after the bullet emerges?
Two point charges of 30x10^-9C and -40x10^-9C are held fixed on an x axis at the origin and x=40cm respectively. A particle having mass 2x10^-6kg with a charge of 50x10^-6C is released from rest at(