The initial speed of the sled at the given height is 4.85 m/s.
<h3>Initial speed of the sled</h3>
Apply the principle of conservation of energy;
K.E = P.E
¹/₂mv² = mgh
v² = 2gh
v = √2gh
where;
- h is the vertical height reached
- g is acceleration due to gravity
v = √(2 x 9.8 x 1.2)
v = 4.85 m/s
Thus, the initial speed of the sled at the given height is 4.85 m/s.
Learn more about initial speed here: brainly.com/question/24493758
#SPJ1
pshyical change is a usually reversible change of a substance, as size or shape: Freezing a liquid is a physical change. Compare chemical change.
internal change is when the movement of the particles increases
specific latent heat is the amount of energy per kg (unit mass) required to change ice to water without change in temperature.
The ability of thermal energy to dissipate too quickly and not get concentrated makes it not suitable for doing work. In addition, thermal energy comes from the rapid movement of particles in which it is directly proportional. Therefore, the faster the particle movement, more heat or thermal energy is generated.
Answer:
F = mg/2
Explanation:
The full question is attached to the solution of this question.
The forces acting on the box include the weight of the box, the force, F and the tension in the wire attached.
The force required to pull up the box at constant velocity normally is equal to the weight of the box.
W = mg
But in this setup,
The force balance on the box
Sum of upward forces = sum of downward forces.
T + F = mg
But the pulley is frictionless, hence, the force, F is equal to the tension in the wire.
T = F
2F = mg
F = mg/2
Hope this Helps!!!
Answer:
Conventional current flows from cathode to anode. It is opposite to the direction of flow of electrons.
Explanation:
Hope this helped, Have a Great Day!!
