0
What is the kinetic energy of a block if a 6.8 kilogram block is sliding down a horizontal frictionless surface at a constant speed of 6 meters per second?
Nettyflores
Kinetic Energy - EK (J) = 1/2mv2
Where m = mass (kg)
v = velocity (ms-1)
Therefore a 6.8 kg block travelling at 6 ms-1 has kinetic energy equal to:
(6.8/2) x 62
= 3.4 x 36
=122.4 Joules
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
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).
A particle is projected at 60 degree to the horizontal with a kinetic energy k the kinetic energy at highest point is?
k/4
A shopping bag is hanging straight down from your hand as you walk across a horizontal floor at a constant velocity does this force do any work while you are riding up an escalator at constant velocit?
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.
What happens to the kinetic energy when you increase the speed but keep the mass constant?
the speed will make the kinetic energy smaller.
What happens to an objects kinetic energy as its mass increases?
kinetic energy, K.E = 1/2 mv^2 that is, it is directly proportional to mass, assuming velocity to be constant and is directly proportional to square of velocity assuming mass to be constant.
During the swing of a frictionless pendulum what energy forms remain constant?
The sum of potential + kinetic energy.
How can an object accelerate if kinetic friction is equal and opposite to horizontal force which would mean it has a net force of zero?
It wouldn't accelerate. It would move at a constant velocity due to its tendency to keep moving (inertia) and friction being canceled out by the horizontal force.
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).
A particle is projected at 60 degree to the horizontal with a kinetic energy k the kinetic energy at highest point is?
k/4
A horizontal force of 100 N pushes a box across a floor at a constant speed. what is the force of friction acting on the box?
If the horizontal velocity is constant, then the horizontal acceleration is zero,and the net horizontal force is zero.But if you are saying that the body was in constant motion and after that the force was applied, then the body will acccelerate because of the force. The net force applied on the body would be equal to the force applied to it when the body was in constant motion as here the force is in direction of the motion and hence the angle will be 0 giving the value of cos 0º as 1. Hence there would be no reduction in the net force
How is energy in potential and kinetic conserved?
For any object, the summation of its potential and kinetic energies is constant.
Why is it easier to determine the coefficient of kinetic friction if the object moves with a constant velocity?
if moving with constant velocity the only force to slow it down is kinetic friction; if it is accelerating velocity is not constant and an additional force is being applied.
A shopping bag is hanging straight down from your hand as you walk across a horizontal floor at a constant velocity does this force do any work while you are riding up an escalator at constant velocit?
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.
What happens to the kinetic energy when you increase the speed but keep the mass constant?
the speed will make the kinetic energy smaller.
What does boltzmann constant represent?
Boltzmann's constant relates the average kinetic energy of particles in a gas with the temperature of the gas.
As mass decreases kinetic energy increases?
kinetic energy of object=1/2 (mv2 ) mass of that object remains constant through out the motion so K.E. remains constant.. if some how mass decreasing then by formula we can see that the kinetic energy will also decrease.
What is a scientific word that starts with the letter 'K'?
Kelvin, Keratosis, Kilogram, Kinetic, Kangnasaurus, Kunzite,
