The answer to this question is false
Answer:
the normal force
Explanation:
The free-body diagram represents all the forces acting on an object. In this example, there are four forces acting on the box: an applied force, the friction (which always act opposite to the applied force), the weight of the box (which is always downward), and the normal force.
The normal force is the reaction force exerted by the surface on which the box is moving on the box, and this reaction force is always opposite to the force exerted by the box on the surface. Since the latter is downward, it means that the normal force must be upward, so in the diagram it is wrong.
<h2>
reasons- instead of two,i got you five</h2>
1.Energy efficiency saves you money.
2.Energy efficiency improves the economy.
3.Energy efficiency is good for the environment.
4.Energy efficiency improves national security.
5.Energy efficiency enhances quality of life.
The body will take 20 seconds to cover a distance of 1000 m i.e. 1 km
Answer:
28.3 N
Explanation:
W = weight of the ladder = 200 N
L = length of the ladder = AC = 3 m
AD = distance of base of ladder from wall = 1 m
AB = distance of center of gravity from base = 1.2 m
F = force from the wall
f = frictional force acting between the ladder and floor
In triangle ACD
Cosθ =
Cosθ =
Sinθ =
Sinθ =
Sinθ =
Using equilibrium of torque about the base of ladder
W Cosθ (AB) = F Sinθ (AC)
(200) () (1.2) = F () (3)
F = 28.3 N
Using equilibrium of force along the horizontal direction
f = F
f = 28.3 N