Answer:
(a)
(b)
Explanation:
Given data
The angular velocity of two cylinders ω=257 rad/s
The mass of the two cylinders m=2.88 kg
The radius of small cylinder r₁=0.319 m
The radius of larger cylinder r₂=0.605 m
For Part (a)
The rotational kinetic energy of the cylinder is given by:
Where I is rotational of inertia of solid cylinder about its central axis.
So
Substitute the given values
So
For Part (b)
Substitute the given values
Answer:
6 m/s²
Explanation:
From the question given above, the following data were obtained:
Velocity (v) = 30 m/s
Time (t) = 5 s
Acceleration (a) =..?
Acceleration is defined mathematically as:
Acceleration (a) = Velocity (v) /time (t)
a = v /t
With the above formula, we can obtain the acceleration of the object as follow:
Velocity (v) = 30 m/s
Time (t) = 5 s
Acceleration (a) =..?
a= v/t
a= 30/5
a = 6 m/s²
Therefore, the acceleration of the object is 6 m/s² due East.
F = MA
30,000 kg * 1.5 m/s^2 = 45,000 N
Answer:
A. Yes, when another driver makes a mistake, you will have time to react
Explanation:
Yes it is good to make space cushion between two cars because due to some urgency when front vehicle applied brakes then the driver of the rear car will definitely take some time to react.
This reaction time may be between 0.5 s to 0.8 s for different people
so the rear car will move with same speed for above reaction time and it will cover the cushion distance between two cars
If we will not maintain this cushion distance between two cars then we can see that the two cars will collide and that may cause many accidents
so it is correct statement and correct option would be
A. Yes, when another driver makes a mistake, you will have time to react