Physics Force & Laws Of Motion Level: Misc Level
A ball of mass 1.6 kilograms is projected with a velocity 19.5 m/s in a direction 30.7 degrees from the horizontal. The acceleration due to gravity is g =9.81 m/s 2. What is the force acting on the ball the moment it is projected (in Newtons)
Physics Force & Laws Of Motion Level: Misc Level
A bucket of water which weighs 10.7 Newtons is pulled vertically using two forces. The first of magnitude 8.6 Newtons acts at an angle 59 degrees from the vertical. The second acts at an angle 18 degrees from the vertical. Find the net force acting on the bucket (due to the forces and the weight) in Newtons.
Physics Force & Laws Of Motion Level: Misc Level
A box of mass 8.3 kg placed on a smooth horizontal table is acted on by two horizontal force. The first of magnitude 0.3 Newtons acts due East, and the second of magnitude 0.3 Newtons acts due North. Find the velocity of the box after 14.9 seconds.
Physics Gravitation Level: Misc Level
Asteriod
The asteroid Europa orbits the Sun like the other planets. Its period is about 1980 days. What is its mean distance from the Sun?
Physics Gravitation Level: Misc Level
M 1 is a spherical mass ( 27.0 kg ) at the origin. M2 is also a spherical mass ( 10.3 kg) and is located on the x- axis at x= 92.0 m.At what value of x would a third mass with a 12.0 kg mass experience no net gravitational force due to M 1 and M 2?
Physics Gravitation Level: Misc Level
Gravity in Space
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weak gravity is 275 km above the Earth s surface in terms of g.Do not enter units.
Physics Gravitation Level: Misc Level
Acceleration Due to Gravity
Calculate the acceleration due to gravity on Uranus. The radius of Uranus is about 2.56 E+7 m and its mass is 8.68 E+25 kg.
Physics Gravitation Level: Misc Level
(a) Calculate, using Newton s law of gravity, the size of the force of attraction between the Earth and a mass of 5.0 kg on the Earth. Data: Distance to the center of Earth from the surface =6370 km.Mass of Earth = 5.98 10 24 kg. Gravitational constant (G =6.67 times 10-11 Nm^2 /kg^2).
(b) Calculate, using Newton s law of gravity, size of the force of attraction between the moon and a mass of 5.0 kg on the earth surface nearest the moon. Data: Distance to the moon from surface of the earth =376,000 km. Mass of moon =7.36 times 10 22 kg.
Physics Properties Of Matter Level: Misc Level
A venturi tube may be used as the inlet to an automobile carburetor. If the 2.0 cm diameter pipe narrows to a 1.2 cm diameter, what is the pressure drop in the constricted section for an airflow of 2.2 cm /s in the 2.0 cm section? ( p =1.2 kg / m ^3 )
Answer should be about 2.0 x 10 ^-3 Pa
Physics Properties Of Matter Level: Misc Level
A Boeing 737 airliner has a mass of 25,000 kg and the total area of both wings ( top or bottom ) is 100 m ^ 2. What is the pressure difference between the top and bottom surface of each wing when the airplane is in flight at a constant altitude?
Physics Properties Of Matter Level: Misc Level
In a wind tunnel the pressure on the top surface of a model airplane wing is 8.6 x 10 ^4 N /m ^2 and the pressure on the bottom surface is 8.8 x 10 ^4 N /m2. If the area of the top and bottom surfaces of each wing is 1.8 m^2, what is the total lift on the model airplane?
Answer should be about 7.2 x 10 ^3 N.
Physics Properties Of Matter Level: Misc Level
The pressure inside a commercial airliner is maintained at 1 A T M. What is the outward force exerted on a 1.3 m x 1. 0 m cabin door if the outside pressure ( at an altitude of 10 km ) is 0.28 A T M ?
Answer should be about 0.9 x 10 ^5 N
Physics Properties Of Matter Level: Misc Level
What is the total force acting inward on a spherical bathysphere of diameter 1.90 m at an ocean depth of 1100 m? ( The pressure inside the bathysphere is, 1 A T M ) (p (sea) =1.02 x 10 ^ 3 kg /m ^ 3 )
Physics Properties Of Matter Level: Misc Level
A uniform block of height 0.180 m, floats in turpentine of density 870.0 kg /m 3. The bottom of the block is 0.170 m below the surface of the turpentine. (a) What is the density of the block?
(b) Ethyl alcohol with a density of 791.0 kg /m 3 is poured slowly over the block until the block is totally immersed. Assume that the two liquids do not mix. How much does the depth to which the block immersed in the turpentine change? For convention use positive as meaning more of the block is immersed in the turpentine and negative as less.
Physics Properties Of Matter Level: Misc Level
A recreational ( open ) hot air balloon ( i. e., P inside is approximately P outside ) has a volume of 2339 m3 when fully inflated. The total weight of the balloon, basket, ballast and pilot is 1852.2 N (417 lbs). By how much must the density of the air in the balloon be smaller than that of the surrounding atmosphere in order to keep the balloon floating level near the ground?
