Answer:
0.278 rad/s
Explanation:
d = Diameter of space station = 252 m
r = Radius =
g = Acceleration due to gravity = 9.80 m/s²
= angular velocity
Here the centripetal acceleration and the acceleration due to gravity will balance each other
Centripetal acceleration is given by
The angular velocity required would be 0.278 rad/s
Answer:
is the final velocity of the racket.
Explanation:
Given:
- mass of the racket,
- mass of ball,
- initial speed of racket,
- initial speed of ball,
- final speed of ball,
- time of contact of racket with the ball,
<u>By the law of conservation of momentum:</u>
where: final velocity of the racket
is the final velocity of the racket.
<u>By the Newton's second law of motion:</u>
............................(1)
where:
dp = change in momentum
dt = change in time
Change in momentum of ball:
Now, using eq.(1):
Answer:
Factor of 1.1
10%
Explanation:
The following table presents Samantha's change in height with age:
The factor F by which her height changed is:
The percentage increase in her height is:
Answer:
The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task. To achieve this, the force applied must act over a longer distance or period of time resulting in the same amount of work being performed by a smaller force.