Answer:
Weight
a) weight's vertical component = Normal upward force
b) weight's horizontal component = Friction force = (mass of ball)(acceleration)
These forces depend upon the track,
1) inclined or horizontal
2) steepness.
Explanation
The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the weight which points along the direction of the ball's motion can accelerate the ball.
weight's horizontal component = Friction force = (mass of ball)(acceleration)
The other component pushes the ball into the ramp, and the ramp pushes back.
If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp. Hope this helps. Can u give me brainliest
Explanation:
The answer is:
A) Light wave changes direction.
Here is why:
In refraction, the<u> light bends or changes direction</u> when it passes through one medium to another. The change happens because the speed of light is different depending on the medium it passes through because the density of the medium is different.
Another difference would be the angle of incidence. In reflection the angle of incidence is equal to the angle of reflection but in refraction, they are not the same.
A hypothesis should come first. An if...then statement
Answer:
86.14 meters.
Explanation:
Step one:
Given data
velocity of car = 26 m/s
the coefficient of static friction between the tires and the road
µ = 0.4 (kinetic)
Let us take g = 9.81 m/s^2
Required
The distance x = distance in m
We know that
W = F*x (Work is force times distance)
Step two:
Conservation of energy gives
KE = W
Substituting gives
Solving for distance (x) gives
Simplifying
Substitute:
Therefore, the minimum braking distance is 86.14 meters.
Answer:
Explanation:
Given: that,
Angle of inclination of the surface,
mass of the crate,
Force applied along the surface,
distance the crate moves after the application of force,
a) work done = F× s
work done = 230 × 1.1
work done = 253 J
b) Work done by the gravitational force:
where:
g = acceleration due to gravity
h = the vertically downward displacement
Now, we find the height:
So, the work done by the gravity:
∵direction of force and displacement are opposite.
= - 343.54J
c)
The normal reaction force on the crate by the inclined surface:
d)
Total work done on crate is with respect to the worker: