How high was the copter when the package hit? Honors Supplement 1. If, from a height of 62m, Galileo accidentally dropped one of the cannon balls 0.5sec before the other, with what velocity would the second ball I have to be thrown downward to reach the ground at the same time as the first ball? [-5.3 m/s] 2. A flowerpot is dropped and passes by a window below.
21) One rock is dropped from the top of a cliff of height h at the same time as a second rock is tossed upward at speed v. if the rock that was tossed upward takes twice as much time to reach the ground as the one that was dropped, what was the initial speed, v, of the rock that was thrown (state in terms of g and h)? 22) A 0.50 kg cart moves on a straight horizontal track. The graph of velocity v versus time t for the cart is given below. a. Indicate every time t for which the cart is at rest.
N05/4/PHYSI/SPM/ENG/TZ0/XX+ A ball is held at rest at point X and is then released. It drops on to a flat horizontal surface and rebounds to a maximum height at point Y. point X point Y before after Which one of the following graphs best shows the variation with time t of the momentum p of the ball as it moves between point X and point Y? A. p B.
49. What is the magnitude and direction of the electric force on a −1.2 μC charge at a point where the electric field is 2500 N/C and is directed along the +y axis. 55. A total charge of –6.50 µC is uniformly distributed within a sphere that has a radius of 0.150 m. What is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? 53.
Don’t confuse mass and weight as mass is actually the amount of ‘stuff’ that makes up an object measured in kilograms. Weight is the force calculated by Weight (N) = Mass (kg) x Gravitational field strength (N/kg) W m The gravitational field strength on Earth is taken as 10N/kg. A resultant force is the sum of forces acting on an object. 2N 4N 4N Resultant force = 2N + 4N = 6N to the right g 2N
So you see, Newton's 3rd law can explain your balloon powered car. air shoots out the back at high speed and the car moves forwards (more or less) at low speed. So the force used to accelerate all that air backwards has an opposite force on the balloon (reaction) which is tied to the car so pushes in the opposite direction. Well the air's coming out fast in the beginning but thats when the car is only just moving, it takes a while to speed up and it takes even longer if you have a heavy car. So you may be able to argue it shows that f is proportional to Mass x acceleration (but to be honest I think that would be stronging it a bit - balloons don't seem to give very constant thrust.
5 How long will your trip take (in hours) if you travel 350 km at an average speed of 80 km/hr? 6 How many seconds will it take for a satellite to travel 450 km at a rate of 120 m/s? 7 What is the speed of a walking person in m/s if the person travels 1000 m in 20 minutes? 8 How far (in meters) will you travel in 3 minutes running at a rate of 6 m/s? 10 In 0.5 seconds, a projectile goes from 0 to 300 m/s.
The oldest roller coaster descended from the Russian mountains and was heavily constructed hills of ice, located near St Petersburg. Built in the 17th century, the slides were built to a height of between 70 feet (21 m) and 80 feet (24 m), it consisted of a 50 degree drop, and was reinforced by wooden supports. These slides became popular with the Russian upper class. (Wikipedia 2June 2011) In 1959, the Disneyland theme park introduced a new design breakthrough in roller coasters with the Matterhorn Bobsleds. This was the first roller coaster to use a tubular steel track.
The highest point in the state is Guadalupe Peak at 8,749 feet above sea level. Elevation naturally rises from the east to the west and from the south to the north. Major Cities - Rainfall / Elevation Regional Average Rainfall: 8-20 inches per year Regional Average Net Evaporation rate: 52-68 inches Data source: National Climate Datat Center, U.S. Dept of Commerce. Alpine - 17.19 in. / 4,530 ft. Balmorhea - 14.19 in.