Alice and Tom dive from an overhang into the lake below. Tom simply drops straight down from the edge, but Alice takes a running start and jumps with an initial horizontal velocity of 25 m/s. Neither person experiences any significant air resistance. Just as they reach the lake below.A) Alice reaches the surface the lake first. B) Tom of reaches the surface of the first. C) Alice and Tom will reach the surface of the lake at the same time. D) Information is not enough
Answers
Answer:c
Explanation:
Given
Alice launches with horizontal velocity
Tom simply drops straight down from the edge
Time taken by both the person is same as they have same initial vertical velocity i.e. zero so the time taken to reach the ground is zero.
Although Alice will travel more horizontal distance compared to Tom.
Thus option c is correct
Related Questions
You or your personal trainer should always use the _____ safety screening.PAC-R PAR-Q PRA-Q Heart Rate Consultation
How do elements change as you move down a column in a periodic table? a.the atomic radius decreases b.the number of protons decreases c.the atomic mass decreases d.the electronegativity decreases
Radiative forcing is the amount of change in the thermal energy units (watts/square meter on the earth's surface) caused by a given factor. True or False?
Help!6. Assume a position vs time graph displays a horizontal line, what does this represent?A. Constant VelocityB. 0 Acceleration
b. 9.8 meters per minute
c. 8.9 meters per minute squared
d. 9.8 meters per second squared
Answers
Answer:
9.8 meters per second squared
Explanation:
Answers
equal to the static frictional force.
F = (mass) x (gravity) x (coefficient of static friction).
Once it's moving, the force required to keep it moving at a steady speed,
without speeding up or slowing down, is the force of kinetic friction.
F = (mass) x (gravity) x (coefficient of kinetic friction).
In both equations, [ (mass) x (gravity)] is just the object's 'weight'.
the mechanical advantage of a wheel and axle can be calculated.
the mechanical advantage of a pulley can be calculated.
the mechanical advantage of a wedge can be calculated.
Answers
The mechanical advantage of a lever can be calculated if the length of the effort arm and the length of the resistance arm are given.
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
Answer:
The mechanical advantage of a lever can be calculated.
Explanation:
If the length of the effort arm and the length of the resistance arm are given we can calculated the mechanical advantage of a lever. It is also defined as the ratio of output force to the input force. Mathematically, it is given by :
Where
is the output force
is the input force
A lever is a simple machine in which there is a Plank that is free to free to rotate around a pivot. So, the correct option is (a) "the mechanical advantage of a lever can be calculated".
Answers
Answer:
I=P/U=6/12=0.5(A)
Explanation: P=UI ( CÔNG SUẤT = HIỆU ĐIỆN THẾ NHÂN VỚI C Đ D Đ)
Answers
Answers
As it is given to us
also it is given that
P - Q + R = 0
so here we can rearrange it to find the value of R
so here we have
so the vector is given by above equation
Answer:
R= -4 i + 7 j + 6 k
Explanation:
Being P - Q + R = 0, solving for R you get:
R= Q - P
You know:
- P=6 i - 5 j + 2 k
- Q=2 i + 2 j + 8 k
Replacing the expressions of P and Q you get:
R= (2 i + 2 j + 8 k) - (6 i - 5 j + 2 k)
i, j and k indicate that the values correspond to the x, y and z components respectively. To subtract the vectors, their respective components are subtracted from each vector. So in this case:
R= (2-6) i + [2-(-5)] j + (8-2) k
So the answer is:
R= -4 i + 7 j + 6 k