Answer:
key points:1.momentum and impulse
2.condition for conservation of momentum and why
3.how to solve collision problems
4.centre of mass
Explanation:
momentum is a vector
force of a tennis ball
for a top player,a tennis ball may leave the racket on the with a speed of 55m/s(about 120mi/h).if the ball has a mass of 0.060kg and is in contact with the racket for about 4ms(4×10)s.estimate the average force on the ball
<span>Electric current is produced when a changing magnetic field is applied to a conductor, an electromotive force (EMF) is produced, thus causing a suitable path.</span>
Answer:
T = mg - ×V×g
Explanation:
Here we have the mass of the ball is given as
The density of the fluid =
The volume of the ball = V
Acceleration due to gravity = g
According to Archimedes's principle, the upthrust = Weight of fluid displaced
Tension in string = T = weight of ball - upthrust
T = mg - ×V×g
Answer:
a) "gravitation" is the force causing you to go down a waterslide
b) It is "fluid friction" as a solid object (our body) moves over a fluid (the water)
c) It would become "sliding friction" since two solid surfaces slide over each other
d) fluid friction being the weakest friction, switching to sliding friction means a higher decrease in speed and therefore removing the water from a slide will decrease our speed
The way that scientists ensure that data is reliable Clear Explanation