 |
|
| Browse | Ask | Answer | Search | Join/Login |
|
|
||||
|
If the speed of a small sled is always constant, then this means that acceleration a = 0 m/s^2.
From F = m*a it follows that the resulting force F is m*0, which is also 0. Hence, pulling force is equal to the friction force in the magnitude. However, they are opposite in the direction. m*0 = F(res.) = F(pull) + F(friction) = 0 F(pull) = - F(friction) = 20N. Forces are equal in magnitude and therefore, the work they have done is also equal in absolute value. Work by a force W = F*s. |
||||
| Question Tools | Search this Question |
Add your answer here.
Check out some similar questions!
A cannon is fired into a flat valley 100 meters below the initial elevation of the cannon. The initial speed of the cannon ball is 50 meters per second and its initial direction is 30 degrees above the horizon. How long is the cannon in flight? How far horizontally does the cannon ball travel?...
If the zero level is a distance 2h3 above the floor, what is the potential energy U of the block on the floor?
In an action movie, a helicopter with the heroes on board is seen escaping from an underground bunker inside a volcano. The Volcano chimney is 605m tall. The helicopter is moving up with a constant acceleration of 10m/s^2. the villain realized of this and shoots the helicopter with a cannon. If it...
A juggler is throwing a bowling pin straight up with an initial speed of 8.70 m/s. how much time elapses before the bowling pin returns to the jugglers hand?
A bug crawls 3.0 mm east, 4.0 mm north, and then 5.0 mm at 45° north of east. Draw a diagram showing its displacements and determine its resultant vector by use of the diagram.
View more questions Search
|
