If a substance cannot be separated by physical means or chemical means, it is _an element_.
Answer:
Part b)
Explanation:
Part a)
As we know that impulse is due to the force applied for small time due to which momentum is changed
so we will have
so we will have
also we know that
now impulse is given as
Part b)
As we know that
Answer:
A
Explanation:
Density is mass/ volume
if the numerator is greater ( A) then the density is greater than B
Answer:
8.1Ns
Explanation:
Impulse is expressed as the product of Force and time
Impulse = Ft
F is the force = 180N
Get the time using the equation of motion
v = u+at
18 = 0+F/m(t)
18 = 180/0.45(t)
18 = 400t
t = 18/400 secs
Recall that;
Impulse = Ft
Impulse = 180×18/400
Impulse = 8.1Ns
Hence the impulse imparted to the ball is 8.1Ns