If it doesn't move, it doesn't accelerate; therefore the net force must be zero.
gravity and friction
force of friction
It is zero
Work = (force) x (distance) = 30 x 9 = 270 joules
27.5 lbs
It's 320 N. Since the friction force is in the direction opposite to the motion, thepulling force and the friction force balance, the net horizontal force on the box iszero, and its speed is therefore constant.
While you are walking across a horizontal floor at a constant velocity, the force your hand exerts on the bag does no work. However, when you ascend an escalator, the force does perform work on the bag. Why? To do work is to change the energy of an object. In this case we have either kinetic energy, or gravitational potential energy. The first case we are walking on a horizontal floor, there is no change in height, thus no change in potential energy. We are also moving at a constant speed, thus no change in kinetic energy. If we sped up, or slowed down, then we would do work. In the second case, we are ascending an escelator, and changing the height. This changes the gravitational potential energy, and thus does work.
.419 .419
potential
The predicate in this sentence is across the floor. :)
Work= 200 Joules.
Horizontal evacuation is normally used when you move horizontally on the floor to a different area on the same floor.
a ball rolled across a horizontal table moved at cont ant velocity why?
across the floor.
A floor is the lower horizontal surface in a building or room that people walk on.
Across the Nightingale Floor was created in 2002.
Lian Hearn wrote Across the Nightingale Floor.
Across the Nightingale Floor has 343 pages.
Work = (force) x (distance) = 30 x 9 = 270 joules
27.5 lbs