D. a pot of boiling water!
Answer:
15,000 m
Explanation:
speed = 50 m/s
time = 5 minutes × 60
= 300 seconds
substitute the values into the formula
Answer:
a) ω=n
b) V = R*n
c) a = 0
d) 
Explanation:
Angular velocity is given by the derivative of θ:
ω = n
Linear Velocity will be:
V = ω*R = n*R
Tangential acceleration will be the derivative of the linear velocity. Since velovity is constant:
a = 0
Radial acceleration is given by:
Answer:
Explanation:
100 mph = 100 x 1760 x 3 / ( 60 x 60 )
= 146.67 ft / s
70 mph = 70 x 1760 x 3 / ( 60 x 60 )
= 102.67 ft/s
Let mass of the ball = m .
The ball which was moving with a velocity of 146.67 ft/s is turned back by the action of force of bat on the ball and it moved in opposite direction with velocity of - 102.67 ft/s ( - ve sign due to reversed direction )
If m be the mass of ball
change in momentum = m x 146.67 - ( - m x 102.67 )
= m x 146.67 + m x 102.67
= 249.34 m
Change in momentum = impulse = force x time
Putting the given values
249.34 m = force x 1 x 10⁻³ ( time = 10⁻³ s )
force = 249.34 m x 10³ poundal .
Here m is mass of the ball in lb .
