Answer:
B. twice as much kinetic energy
Explanation:
Lets take the mass of the first marble =2 m
the mass of the second marble = m
We know that velocity of particle does not depends on their mass that is the velocity of both mass will be same after dropping from the roof.
We know that kinetic energy of a mass is given as
Kinetic energy for heavier mass
Kinetic energy for light mass
KE=2 KE '
Form above two equation we can say that ,the kinetic energy for the heavier mass is twice the lighter mass.
Therefore the answer will be B.
Answer:
8 m/s to the left.
Explanation:
Applying,
V = d/t...................... Equation 1
Where V = Velocity of the car, d = distance, t = time
From the question,
Given: d = 24 meters, t = 3 seconds
Substitute these values into equation 1
V = 24/3
V = 8 m/s to the left.
Hence the velocity of the car is 8 m/s to the left.
B the desert was once covered in water
P is disproportional to t, which means that if P increases with x factor, the t will decrease with the same x factor. If t increases then P decreases
Answer:
Explanation:
v = ax + b
when x = 0 , v = 10 ( given )
10 = b
when x = 1 , v = 25
25 = a + b
25 = a + 10
a = 15
So
v = 15 x + 10
acceleration
v = 15 x + 10
differentiating it on both sides wrt t
a = dv / dt = 15 dx / dt
a = 15 v = 15 ( 15x + 10 )
a = 225x + 150
acceleration at x = 0
a = 150 m/s²
acceleration at x = 1 m
a = 225 + 150
= 375 m /s²