Answer:
L = 1.06 m
Explanation:
As per work energy theorem we know that work done by all forces must be equal to change in kinetic energy
so here we will have
now we know that
initial and final speed of the book is zero so initial and final kinetic energy will be zero
here we know that
k = 250 N/m
x = 0.250 m
m = 2.50 kg
now plug in all data in it
now we have
The greater the change in velocity, or speed.
-- The 'gas pedal' causes the car's speed to increase.
-- The brake pedal causes the car's speed to decrease.
-- The steering wheel causes the car's direction to change.
Each of these changes is a change in velocity, otherwise
known as an acceleration.
Answer:
Work done by the frictional force is
Explanation:
It is given that,
Mass of the car, m = 1000 kg
Initial velocity of car, u = 26.1 m/s
Finally, it comes to rest, v = 0
We have to find the work done by the frictional forces. Work done is equal to the change in kinetic energy as per work - energy theorem i.e.
W = −340605 J
or
Hence, the correct option is (a).
48 years, 1912-1960, July 4, the 50-star flag makes its debut in Philadelphia, Pennsylvania. A 50th star was added to the American flag in honor of Hawaii's August 21, 1959 admission into the Union