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The masses of the javelin, discus, and shot are 0.80 kg, 2.0kg, and 7.2 kg, respectively, and record throws in thecorresponding track events are about 98 m, 74 m, and 23 m,respectively. Neglecting air resistance,
(a) calculate, the minimuminitial kinetic energies that would provide these throws, and
(b) estimate the average force exerted on each object during the throw,assuming the force acts over a distance of 2.0 m.
(c) Do yourresults suggest that air resistance is an important factor?
A soccer ball whose radius is 11 cm rolls a distance of 10 min 3.50 s. It rolls without slipping. What is the angular speed of the ball
The Dyson sphere is an hypothetical spherical structure centered around a star. Inspired by a science fiction story, What is the net gravitational force Fin on a unit mass located on the inner surface of the Dyson sphere described in Part A
A sample with a temperature of 106.51 degrees C is dropped into an insulated cup containing water whose mass is the same as the sample and whose temperature is initially 50 degrees C. The sample raised the temperature of the water to 60 degrees C. ..
The artery in the figure has an inside diameter of 2.75 mm and passes through region where the magnetic field is 0.65 T. what is the speed of the blood
A hydrogen atom is in its first excited state (n = 2). Using the Bohr theory of the atom, compute the linear momentum of the electron
A meter stick is pivoted at the 0.50 m line. A 3kg object is hung from the 0.15-m line. Where should a 5kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?
A box weighs 190 N on earth., What is its mass (kg) on Jupiter and What is its weight (N) on Jupiter where free-fall acceleration is 25.9 m/s^2
A 500g model rocket is on a cart that is rolling to the right at a speed of 3.0m/s. The rocket engine, At what horizontal distance left of the hoop should you launch
q1. a cannonball shot with the initial velocity of 129 ms at an angle of 36deg follows a parabolic path and hits a
Three forces are applied to a solid cylinder of mass 12 kg (see the drawing). The magnitudes of the forces are F1 = 15 N, F2 = 24 N, and F3 = 16 N. Find the magnitude of the angular acceleration of the cylinder
A lens is formed from a plastic material that has an index of refraction of 1.55. If the radius of curvature of one surface is 1.25 m, calculate the focal length and the power of the lens.
You are trying to hit a cart of mass 0.3 kg on a frictionless table with a toy projectile launcher. At what angle relative to North do you want to fire the projectile
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