Can anyone please help me with this one

if a girl is running along a straight road with uniform velocity 1.5 metre per second find the acceleration

PilotLPTM [1.2K]

Answer:

Acceleration is 0.

Explanation:

Since the girl is running with a uniform velocity, meaning she is moving at a constant rate, she is not accelerating. Acceleration only occurs when the speed of an object increases, decreases, or if there is a change in direction.

4 0

3 years ago

A plane is flying to Minnesota with a velocity of 277.73 km/h, N. The plane

umka2103 [35]

Answer:

466 km/h

255°

measured anticlockwise from the east direction

Explanation:

find the resultant velocity of a plane after a crosswind affects its motion. take the positive

x -direction as east, and the positive y -direction as north. The components of the plane's velocity (without wind) are

upx = 0
upy = 450 Km/ h

And for the wind.

uwx = - 120 Km/h
uwy = 0

The components for the resultant velocity of the plane are given by

ux =upx + uwx = 0 - 120 Km/h = - 120 Km/h

uy = upy + uwy = - 450 Km/h +0 = - 450 Km/h

The magnitude of the resultant velocity is

$\sqrt{(vx)^2+(vy)^2} =\sqrt{(-120lkm/h^2+(-450lkm/h)^2}$

= 466 km/h

Hope this helps u : )

7 0

1 year ago

Question 2 of 25

True [87]

Answer: The symbol representing the result of a gas expanding against a constant pressure is W

Explanation:

According to first law of thermodynamics, energy can neither be destroyed nor created but rather transferred to one place to another and converted to and from other energy forms.

The mathematical form of first law of thermodynamics is:

$\Delta U=q+W$