Answer:
bar one:constant acceleration
bar two:remains stationary
bar three:constant acceleration
Answer:
10 m/s
Explanation:
Since acceleration is rate of change of speed per unit time and we know the initial velocity is zero then (v-u)/t= a hence v=at where v is the final velocity, u is initial velocity which is zero, t is time and a is acceleration. Substituting the value of acceleration with 2m/s2 and t for 5 s then
V= 5*2=10 m/s
Answer:
The approximate distance traveled by the ball would be 80 meters in 4 seconds.
Explanation:
Given the canon has a horizontal velocity 140 m/s when it is launched from a tower.
We can see that as was fired horizontally the vertical component of the velocity is zero.
Now, the only force that causes ball to fall to the ground is the gravitational force.
Also, it was given that we need to neglect air resistance.
So, this the condition of free fall. We will use its formula
Where,
is the distance traveled vertically.
is the time of fall.
is .
Plugging these values we get,
So, the approximate distance traveled by the ball would be 80 meters in 4 seconds.
It's B because it talks about if it harms people. That would be an example of a medical/ethical issue.
The sentence can be completed as follows:
<span>The motion of an object moving with uniform circular motion is always tangential to the circle, so the speed of an object moving in a circle is known as tangential speed.
The object moves by uniform circular motion due to the presence of a force (called centripetal force) pointing toward the center of the circle. Due to the presence of this force, the object experiences an acceleration (called centripetal acceleration) that makes the object turning in a circle. This centripetal acceleration changes only the direction of the velocity of the object, not its magnitude, which is called tangential speed and it is constant.</span>