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A 250-kilogram car is initially at rest at point A on a roller coaster track The car carries a 75-kilogram passenger and is 20 meters above the ground at point A Neglect friction?
Wiki User
∙ 12y ago
⌂PE = mg⌂h
⌂PE = (250 kg + 75 kg)(9.81m/s^2)(20m)
⌂PE = 63765 or 6.4 x 10^4 J
Wiki User
∙ 12y ago
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When a body slides over a surface the kinetic friction and static friction related as?
Kinetic friction is the friction that applies when an object is moving; static friction is the friction that applies when the object is not moving. Static friction must always be greater than, or equal to, kinetic friction.
Is rolling friction greater than sliding friction?
Typically not. However rolling friction is somewhat of a myth. Rolling friction is actually caused by static friction. There are really only two types of friction: Static and Kinetic. That's it! Rolling friction is caused by static friction and the coefficient of friction (which determines its strength) is dependent upon the two materials of interaction.
What is the advantages of friction?
what is the advantages of friction
Is friction a natural force?
friction is a natural force
What is coeffitient of stactic n kinetic friction?
The coefficient of static or kinetic friction depends on the surfaces that are causing friction. The formula for it is: force of friction over normal force.
What is an example of being opposed by static friction?
When you move a heavy object, you must apply a lot of force before the heavy object begins to move. This resistance you feel while the box is NOT moving is static friction. Static friction opposes movement in an initially non-moving object.
Difference between static and kinetic friction?
Static friction is the friction that acts between two objects which are not moving in relation to each other. For example, it is the force that prevents you a block from sliding down a ramp with a small incline. Dynamic friction is the friction that acts between two objects which are moving in relation to each other. For example, it is the force that makes pushing a heavy box across the floor difficult.
What will be the acceleration of a block of mass 10kg a force of 50Newton is acting on it coefficient of friction is 0.5Newton and the block is at rest initially?
Coefficent of friction isn't measured in Newtons. F=COF.R R=mg therefore F=49.05N F=ma a=(50-49.05)/10 a=0.095m.s-2
Which forces change the rate and direction of an object in motion?
Any force will change the rate and/or the direction or an object, whether or not it is (initially) in motion.The only exceptions would be if there is something (like a surface supporting it) keeping the object from moving in the direction of the force, or if the object is initially not moving, and the force in not enough to overcome friction.
What forces act on something moving through water?
-- gravity -- buoyancy -- water resistance (friction, drag) -- wind, engine, paddle ... whatever moved it through the water initially and may be continuing
What has the author John Edwin James written?
John Edwin James has written: 'Force losses due to friction on a straight compressed steel tendon in an initially unstressed 90 ft. duct'
What are the 2kinds of friction?
Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.
Which friction has least value option sliding friction static friction rolling friction Air friction?
i think it it rolling friction
What do lubricants do to friction by replacing sliding friction with fluid friction?
Lubricants reduce friction by replacing sliding friction with fluid friction.
Which friction is greater sliding friction or static friction?
Static friction
Which force is weakened when the floor is wet?
Friction is reduced on a wet floor.
What are the kinds of friction?
the kinds of friction are dry friction,fluid friction,lubricated friction,skin friction and internal friction. 80409e2d-12a3-4f5b-ba94-08ddbe6232dc 1.03.01
