0
What is the acceleration of the 25 kg crate which is pulled by a rope along a frictionless surface at an angle of 30 degrees above the horizontal if the tension on the rope is 120 N?
Wiki User
∙ 12y ago
the force acting down the slope = sin 30 * 25 (kg) = 0.5 * 25 = 12.5 kg = (12.5 * 9.806 ) 122.575 newtons = resultant force of (122.575-120 ) 2.575 newtons downhill giving downhill acceleration of (using f=ma) 0.103 (m/s)/s
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Can acceleration happen on a frictionless surface?
yes
When a horizontal force equal to its weight is applied to an object on a frictionless surface what is its acceleration?
9.8 meters (32.2 feet) per second2 horizontally, provided the exercise is performed on or near the Earth.
What surface is 90 degrees to a horizontal surface?
Perpendicular
What surface is 90 degrees to a horizntail surface?
A wall is an example of a surface standing at 90 degrees from the horizontal.
Three blocks that are connected by massless strings are pulled along a frictionless surface by a horizontal force?
Well it's obviously not flying.
Can frictionless surface exist?
No.
In what direction is the polarization of the glare that reflects from a horizontal surface?
It is polarized at 90 degrees to the plane of incidence. If the surface is horizontal, the plane of incidence is vertical & the polarization would be horizontal.
What is the net force acting if an object is moving along a surface with a constant acceleration?
If the object is moving along a horizontal surface with a constant acceleration,then the net vertical force on it is zero, and the net horizontal force on it is(the pushing force) minus (any kinetic friction force where it rubs the surface).The numerical value of that net force is(the acceleration) times (the object's mass).
What does the coefficient of static friction represent?
In free space or on a frictionless surface, it takes no force to move something. Where there is friction, the ratio of (force necessary to start it moving horizontally)/(the object's weight) is the coefficient of static friction on the horizontal surface.
A line perpendicular to a surface?
Would be at at 90 degrees to the surface, in other words at right angles. So a line which was perpendicular to a horizontal surface would be vertical.
Will a skateboard go faster if you push it with the same force for a longer time?
Yes. The force is measured as "acceleration" and is meters per second per second (or velocity per second) or the first derivative of velocity. On a frictionless surface in an environment without air resistance, and if the skateboard is a frictionless mechanism, if the skateboard is moving at a constant velocity, that means the acceleration is zero, which means that there is no force being applied to it and it is a body in motion staying in motion.
When and object slides over a smooth horizontal surface how does the force of friction depend on the force of gravity on the object?
If the surface is smooth then it is almost frictionless. Hence the body will continue to move with constant velocity. However the object continues in a circular path and the weight is thus the centripetal force. It is assumed that the surface is very large)
