Physical changes: melting, evaporating, and condensation. This is a physical change.
a = ( v(2) - v(1) ) ÷ ( t(2) - t(1) )
2 = ( v(2) - 10 ) ÷ ( 6 - 0 )
2 × 6 = v(2) - 10
v(2) = 12 + 10
v(2) = 22 m/s
Answer:
A
Explanation:
I only think its A because of the gravity part...sorry im not good at explaining
The correct answer to the question is : Air resistance.
EXPLANATION:
Before coming into any conclusion, first we have to understand the terminal velocity.
An object is said to be moving with terminal velocity if the net force acting on the object is zero i.e the body is non accelerating.
As per the question, the object is falling under gravity. The force of gravity acts in vertical downward direction.
Except gravity, the object is also under air resistance. It is the force which opposes the motion of the object, and acts in vertical upward direction.
If the air resistance becomes equal to force of gravity, then the net force acting on the object is zero . It is so because two forces act in opposite direction.
In case of liquids, the resistance force is called as viscosity.
Hence, the correct answer to the question is air resistance.
Answer:
Explanation:
Using law of conservation of momentum during collision , velocity after collision can be found .
common velocity V = m v / ( m + M )
= .030 x 300 / ( .030 + 1 )
V= 8.7378 m /s
The kinetic energy of the bullet and block will be stored as elastic energy
1/2 ( M + m ) V² = 1/2 k A² where k is force constant and A is maximum compression in the spring .
( M + m ) V² = k A²
1.030 x 8.7378² = 2000 x A²
A² = .0393
A= .1982 m .
= 19.82 cm