Answer:
Acceleration of the car, 
Explanation:
Given that,
Initial speed of the car, u = 0 (at rest)
Final speed of the car, v = 40 m/s
Distance covered, s = 100 m
We need to find the acceleration of the car. It can be calculated using third equation of motion as :

a is the acceleration of the car



So, the acceleration of the car is
. Hence, this is the required solution
Answer:
specific gravity = 0.8
specific gravity of solution = 2
Explanation:
given data
rectangular block above water = 0.400 in
rectangular block below water = 1.60 in
material floats below water = 0.800 in
solution
first we get here specific gravity of block that is
specific gravity = block vol below ÷ total block vol × specific gravity water ..............1
put here value we get
specific gravity =
× 1
specific gravity = 0.8
and now we get here specific gravity of solution that is express as
specific gravity of solution = total block vol ÷ block vol below × specific gravity block ........................2
put here value we get
specific gravity of solution =
× 0.8
specific gravity of solution = 2
Answer: D. decreasing the temperature
Explanation:
The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force.
Answer:
Explanation:

Subtract both sides by
:

Divide both sides by -2*a:

Add both sides by
:

Subtract both sides by
:
