Answer:
Explanation:
The definition of acceleration is the change in velocity over a period of time. If the girl's velocity is constant, that means it's not changing. Therefore, acceleration is 0 m/s/s
Answer:
The displacement of the block is 9 m.
Explanation:
Given that,
Mass of block = 2 kg
Time = 3 sec
The force is
The acceleration is
Put the value into the formula
We need to calculate the velocity
Using formula of acceleration
Put the value into the formula
We need to calculate the displacement
Using formula of velocity
Hence, The displacement of the block is 9 m.
I hope this helps. it was right when i took the test.
Answer: option (D)
Explanation:
The potential energy of each of the students is given below as
P.E(student A) = mgh, where m = mass of student A, g is acceleration due to gravity and h = height of the high dive structure.
The mass of student B is twice as much as that of A, hence his mass is 2m and his potential energy is given below as
P.E ( student B) =2mgh = 2(mgh)
Recall that the relationship between potential energy and work done is that
Work done = - (change in potential)
For student A, work done = - mgh
For student B, work done = - 2mgh
From the equations above it can be seen that student B will do twice the work in getting to the high dive structure than student A hence validating option D.
I don't know lol hahahahhahahahahahahahahahahahahaha
