Answer:
Explanation:
A. We know that 1microsecond= 10^-6s
So = 9.12*10^-6=9.12*10^-6s
B 1km= 1000m
So 3.42km= 3240m
C.1ms= 10^-3s
And 1cm= 10^-2m
So 44*10^-2m/10^-3s=440m/s
D. 80km/hr= 80*1000/3600= 22.2m/s
Because 1km= 1000m
1hr= 3600s
Answer:
B. He should change the lengths of the vectors that point tangent to the circle so that each is the same length.
Explanation:
A uniform circular motion is a motion in a circle where the tangential speed of the object is constant.
In the motion map:
- The arrows pointing towards the centre of the circle represent the centripetal acceleration, and their length represent the magnitude of the acceleration
- The arrows pointing tangential to the circle represent the tangential speed, and their length represent the magnitude of the speed
In this motion map, we see that the length of the vectors pointing tangent to the circle is not constant: this means that the speed is not constant. In order to have a uniform circular motion, the speed must be constant, therefore the lengths of the vectors that point tangent to the circle must be the same.
Trajectory equation means the locus of the motion of anybody. From this
equation you can get the information of the motion of that body. A projectile is an object that is given an initial velocity, and is
acted on by gravity. The path the object follows is called its
trajectory. The trajectory has horizontal (x) and vertical (y) position
components.
You can use the formula:
<span>y= xtan(θ)− ((g∗x2)/(2v2cos2(θ))</span>
wherein:
y = vertical position (m)
x = horizontal position (m)
v0 = initial velocity (combined
components, m/s)
g = acceleration due to gravity
(9.80 m/s2)
