Answer:
F=480.491 N
Explanation:
Given that
mass ,m = 22 kg
Angular speed ω = 40 rev/min
ω =4.18 rad/s
The radius r= 1.25 m
We know that centripetal force is given as
F=m ω² r
Now by putting the values in the above equation we get
F=480.491 N
Therefore the centripetal force on the child will be 480.491 N.
Answer: 1400 J
Explanation: Work is the product of force and distance.
W = Fd
= 700 N ( 2.0 m)
= 1400 J
Answer
19 m/s
Explanation
<u>Finding the velocity of the initial object</u>
Momentum=mass × velocity
P=m×v
4000=115 × v
v=4000/115 =34.78⇒35m/s
<u>Total momentum after the collision</u>
Because the momentum is conserved, the total momentum afterwards =4000kg-m/s
<u>Total mass after collision</u>
Total mass = mass of initial object + mass of second object
Total mass= 115+100= 215kg
<u>Finding new velocity after collision</u>
v=p/m
=4000/215
=18.60
=19m/s
Answer:
Wavelength
Explanation:
Velocity of a wave is given by
where
= Frequency of wave =
= Wavelength of wave
We have the relation
Now, velocity of the wave in a given medium remains constant. So, if the frequency increases the wavelength must decrease in order to keep the velocity of the wave constant. Also if the frequency decreases the the wavelength increases.
In projectile horizontal distance is given by :
Putting all given values, we get :
Therefore, maximum height of football is 13.1 m.
Hence, this is the required solution.