Answer:
Explanation:
The problem is based on conservation of angular momentum.
Moment of inertia of the disc = 1/2 m R² , m is mass of the disc and R is its radius.
= 1/2 x 98.1 x 1.51²
= 111.84 kg m²
Moment of inertia of disc + moment of inertia of bananas + monkey
= 1/2 x 98.1 x 1.51² + 9.29 x .45 x 1.51 + 20.3 x 1.51² ( moment of inertia of banana and monkey will be equal to mass x radial distance from axis² )
= 111.84 + 6.31 +46.28
= 164.43 kg m²
Now applying law of conservation of angular momentum
= I₁ ω₁ = I₂ω₂
111.84 x 1.69 = 164.43 x ω₂
ω₂ = 1.15 rad / s
Hey there!:
Take the speed of sound to be 343m/s.
Direct frequency perceived by observer:
(343 + 17) / 343) * 90Hz = 94.460Hz
Change in frequency = ( 4.460 - 90 ) = 4.460Hz.
90 - (4.460 x 2) = 81.08 Hz. indirect frequency heard by observer.
Therefore :
Beat frequency = (94.460 - 81.08) = 13.38Hz.
Hope this helps!
Answer and Explanation:
As per the question:
When the stone is thrown from the cliff top and hits the ground below eventually:
R = 
where
= initial velocity
H = height
g = acceleration due to gravity
R = horizontal Range
Now,
(a) Displacement of the stone is given by the horizontal range:
R =
where
= initial velocity
H = height
g = acceleration due to gravity
R = horizontal Range
(b) Speed just prior to the impact is given by the third equation of motion:
where
v = final velocity
(c) Time of flight is given by the second eqn of motion where the initial velocity is considered to be 0 then:
T = 
<span>You do not require a force to keep something moving. You only require a force to get it moving. Or to stop it moving. In your everyday experiences, something you get moving seems to come to a stop after you stop pushing it. It is because there are forces (friction) that make it stop. Without those forces, the object would just keep moving. So this would mean the answer would be True.</span>
Calculate the time it takes for the car to reach the beginning of the hill given that acceleration as already found in part a is 2.89 m/s²
Answer:
5.88 s
Explanation:
Using kinematic equation, v=u+at where v and u are the final and initial velocities respectively, a is acceleration and t is time.
Considering the first part, acceleration is already found as 2.89 m/s and the final velocity is given as 17 m/s while the initial velocity is zero since it is at rest.
Making t the subject of formula then
t=(v-u)/a
Substituting the given figures then
t=(17-0)/2.89=5.8823529411764s
Rounded off, t=5.88 s
