Answer:
We obtain the average velocity instead of the instantaneus velocity.
Explanation:
The problem with calculating speed in this way is that an average speed is being calculated and not an instantaneous speed at a given point.
To calculate the instantaneous speed, a very small space interval must be measured at a given time.
To solve this problem it is necessary to apply the concepts related to Newton's second law and the kinematic equations of movement description.
Newton's second law is defined as
Where,
m = mass
a = acceleration
From this equation we can figure the acceleration out, then
From the cinematic equations of motion we know that
Where,
Final velocity
Initial velocity
a = acceleration
x = displacement
There is not Final velocity and the acceleration is equal to the gravity, then
From the equation of motion where acceleration is equal to the velocity in function of time we have
Therefore the time required is 0.0705s
Answer with Explanation:
We are given that
a.Linear acceleration,a=0.1 g
Moment of inertia of solid sphere,
We know that
Using the formula
b.When a frictionless block were to slide down the incline at that angle then the motion of block will be linear .There is no rotation.
When the sphere is moving without rotation then, the linear speed of sphere will be larger.
When the linear speed is larger then, the linear acceleration will be larger.
Hence, the magnitude of acceleration will be more.