Answer:
a) 
b) 
Explanation:
Given:
- mass of the body,

- mass of the tyre,

- length of hanging of tyre,

- distance run by the body,

- acceleration of the body,

(a)
Using the equation of motion :
..............................(1)
where:
v=final velocity of the body
u=initial velocity of the body
here, since the body starts from rest state:

putting the values in eq. (1)


Now, the momentum of the body just before the jump onto the tyre will be:



Now using the conservation on momentum, the momentum just before climbing on the tyre will be equal to the momentum just after climbing on it.



(b)
Now, from the case of a swinging pendulum we know that the kinetic energy which is maximum at the vertical position of the pendulum gets completely converted into the potential energy at the maximum height.
So,



above the normal hanging position.
False because their are single cell organisms
Answer: 62.5 km/hour is the average velocity of the train.
Explanation:
Displacement of the train = 100 km + 150 km = 250 km
Total time train took =1 hour 15 min+ 45 min + 2 hours = 240 min = 4 hours
Average velocity=
62.5 km/hour is the average velocity of the train.
Answer:
1. Light is electromagnetic waves while sound is mechanical.
Light wave is transverse and sound is longitudinal.
Explanation:
2.
<i = <r
3.
when distance between source and obstacle and distance between obstacle and screen is finite then the diffraction is fresnal diffraction
when distance between source and obstacle and distance between obstacle and screen is infinite then the diffraction is Fraunhofer's diffraction
Answer: The red light bends the least while the violet the most.
Explanation:
i think this is it