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Physics
Two vectors are in the same direction. What shall you do to get the resultant vector?
I have given my son's these kinds of things to ponder since they were little and still like to think of things for them to think about. I thought of this question that we can not agree to an answer on. Here is my question thanks. You have two six foot diameter hollow balls made out of special unheard of metal that does not bend or break. You are able to be beamed into these hollow balls so there is no door. Each has an oxygen supply as well as a seat with seat belts. Both balls are suspended 40 feet above a farmers field. (soil depth before bedrock is 500 feet). Ball A has a total mass of 1000 pounds. Ball B has a total mass of 10,000 Tons. The question is will you have a higher chance of being injured in ball A or ball B or will the odds be the same? Will the extreme mass of ball B act as if the ground was a sponge as it's weight sinks it 20 feet into the ground and cushions the fall? I think a cushion is particularly significant depending on the mass that is being cushioned.
An elevator of mass m is initially at rest on the first floor of a building. It moves upward, and passes the second and third floors with a constant velocity, and finally stops at the fourth floor. The distance between adjacent
floors is h. What is the net work done on the elevator during the entire trip, from the first floor to the fourth floor?
Physics
A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. Calculate the acceleration of the bullet.
Physics
A constant force 3.5 N acts on a 7kg block, initially at rest, for 7.0 s. Find the (a) acceleration of the block, (b) speed of the block at the end of 7.0 s, (c) change in momentum of the block, and (d) impulse produced by the force
The object of curling is for a player to slide a stone on a sheet of ice toward the center of concentric circles. The coefficient of friction between the stone and the ice can be as little as .01. During the delivery you are only allowed to touch the 40 lb stone for 1216mm until you reach the "hog line". If the center of the circle is 6400mm from the hogline how much force needs to be applied to the curling stone?
A bus travel as 60km/hr.how long those it take cover a distance of 500km
Physics
A child pulls a 22 kg sled with a force of 60 N on the sled at an angle of 20˚ above the horizontal, as shown in the figure above. The coefficient of kinetic friction between the sled and the surface is .22.
1) You are the head engineer for a 3,000 kg rocket that is nearing the moon at a speed of 20,000 kilometers per hour (5,556 m/s). It needs to quickly slow to 10,000 kilometers per hour (2,778 m/s) to begin a controlled descent to the surface. If the rocket descends too fast it will crash and too slowly it will run out of fuel. The rocket has a new braking system consisting of several 6.00 kg metal spheres on the front of the rocket that can be fired straight ahead. Each has an explosive charge that fires it at a speed of 120,000 meters per second with respect to the rocket. You need to send the rocket’s computer system a message telling it how many spheres to fire. How many spheres would need to be fired for a safe landing?
Physics
A positive particle of charge 1.0C accelerates in a uniform electric field of 100 V/m. The particle started from rest on an equipotential plane of 50V. After t=0.0002 seconds, the particle is on an equipotential plane of V=10 volts. Determine the distance travelled by the particle.
