0
How freight car of mass 20000kg moves along a frictionless level railroad track with a constant speed of 15ms. What is the momentum of the car?
Wiki User
∙ 6y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How much does each block of stone weigh in a pyramid?
20000kg
A car has a mass of 20000kg and travels at 10000ms what is its velocity?
You mean, travels at 10000 m/s.....if so...Its velocity is 10000m/s
How much force does a 20000kg rocket develop to accerlerate 1m per second per second?
If the mass of the rocket is 20,000 kg, then its weight is (m g) = (20,000 x 9.8) = 196,000 newtons.That's the downward force acting on it.What we want is an upward acceleration of 1 m/sec2.The sum of all forces on it is F = m A, with A = +1.F = (20,000) x (+1) = 20,000 newtons upward.The sum of the forces on the rocket is(Fgravity + Fengines) = (-196,000) + Fengines = 20,000Fengines = 216,000 newtons, upwardNotice that immediately after blast-off, the required force immediately decreases. As fuel isburned off, the mass of the rocket begins to decrease. In practice, the force of the boosterengines remains constant, and the rate of acceleration grows as the mass decreases.
How does the height of the ramp effects the distance the car travels?
1)The work done by gravity on the car is independent of horizontal distance but is proportional to its change in height. this means that the potential energy that is converted to kinetic(motion) energy is all that has changed : Change in potential energy can be found by a simple formula : m*g*h where m is the mass, g is gravitational acceleration (9.8m/s) and h is the change in height. if a car weighs 1000kg and the ramp is 2m high, the kinetic energy will be roughly 20000kg*m/s. and kinetic energy can be found by 1/2mv^2 we solve for v (velocity, speed) and get 6.324m/s or 22km/h. Again, if we don't count slope or friction than the slope of the ramp does not matter. 2)Because of gravity the car is forced downward. The higher the ramp, the more distance gravity has to apply to the car. Therefore, the higher the ramp, the further the car will travel. 3)The higher the ramp, the faster the car goes when it reaches the bottom. The distance depends on speed and friction. With no friction the car would keep going forever.
What is the altitude of cumulus clouds?
It depends on what cumulus type you are talking about. Cumulus humilis clouds are 'fatter' than they are tall. This is what people would usually refer to if they say just 'cumulus'. These are the clouds you see in the morning, and all also called fair weather clouds. You normally see a cumulus humilis cloud at an altitude of 2,000 to 3,500 feet. (600-1,050 m) Cumulus mediocris clouds are an alternate version of the humilis version. These clouds are taller than they are fat. You normally see a cumulus humilis cloud at an altitude of 2,000 to 4,000 feet. (600-1,200 m) Cumulus congestus clouds are the only cumulus clouds that produce substantial precipitation. When you hear someone saying '"cumulus clouds can produce precipitation"', they refer to these clouds. You normally see a cumulus congestus cloud at an altitude of 2,000 to 20,000 feet. (600-6,000 m). If you want to know what my reference is, it is a book called "Weather", by William J. Burroughs, Bob Crowder, Ted Robertson, Eleanor Vallier-Talbot, and Richard Whitaker.
