the mass of modelling clay is 500g
Answer:
Speed, u = 29.4 m/s
Explanation:
Given that, A ball thrown straight up climbs for 3.0 sec before falling, t = 3 s
Let u is speed with which the ball is thrown up. When the ball falls, v = 0
Using first equation of motion as :
v = u + at
Here, a = -g
So, u = g × t

u = 29.4 m/s
So, the speed with which the ball was thrown is 29.4 m/s. Hence, this is the required solution.
Answer:
The average speed of the oil is 1 m/s.
Explanation:
Given that,
Viscosity 
Radius r = 3.0 mm
Length = 1.0 m
Pressure = 200 kPa
We need to calculate the average speed of the oil
Using formula of pressure


Where, A = area
= density of oil
= viscosity
Put the value into the formula


Hence, The average speed of the oil is 1 m/s.
<h3>Option A can be correct because when the meat is kept the rump settles down and the meat is prevented from being messy everywhere.</h3>