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Anastasy [175]
3 years ago
15

10 points

Physics
1 answer:
enot [183]3 years ago
8 0

Answer:

B

Explanation:

I just took the test

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An airplane is being pushed West by its engines with a force of 350 N as it starts to take off the runway at the Atlanta airport
Marizza181 [45]

Answer:

option C

Explanation:

given,

Force by the engine on plane in West direction = 350 N

Frictional force on the runway = 100 N in east

force exerted by the wind = 100 N in east

net force and direction = ?

consider west to be positive and east be negative.

when airplane will be moving there will be frictional as well as wind resistance will be acting in opposite direction of airplane

Net force = 350 N - 100 N - 100 N

                 = 150 N

as our answer comes out to be positive so the airplane will be moving in West

hence, the correct answer is option C

8 0
2 years ago
Which terms describe the motion of most objects in our solar system?
olga2289 [7]

Answer:Geography, Earth Science, Astronomy

Rotation describes the circular motion of an object around its center.

Explanation:

6 0
2 years ago
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A steel ball and a piece of clay have equal mass. They are dropped from the same height on a horizontal steel platform. The ball
emmasim [6.3K]

Answer: The ball (option A)

Explanation: change in momentum is defined by the formulae m(v - u) where m = mass of object, v = final velocity and u = initial velocity.

For the ball, it hits the ground and bounces back with the same speed, that's final velocity equals initials (v = - u)

Change in momentum = m( -u- u) = m(-2u) = m(-2u) = -2mu

For the clay, it final velocity is zero since it sticks to the floor, hence (v =0)

m(v - u) = m(0 - u) = - mu.

-2mu (change in momentum from the ball) is greater than - mu ( change in momentum of clay)

6 0
3 years ago
4. In the Exploration, the sled does not move at all when two equal forces are applied
Assoli18 [71]

Answer:

The net force is zero, so the acceleration is zero

Explanation:

Newton's second law states that the acceleration of an object is proportional to the net force applied to it, according to the equation:

\sum F = ma (1)

where

\sum F is the net force on the object

m is the mass of the object

a is its acceleration

In this problem, we have a sled acted upon two forces, F_1, F_2. So the net force on the sled is

\sum F = F_1 + F_2 (2)

however, we are told that the two forces are equal in magnitude but in opposite directions, so

F_1 = F\\F_2 = -F

So, eq.(2) becomes

\sum F = F+(-F) = 0

and so eq.(1) becomes

\sum F = ma = 0

which means

a=0

so the acceleration of the sled is zero, and if the sled was at rest, it will not move.

7 0
3 years ago
Which particle in the atom has the smallest mass?<br> electron<br> proton<br> neutron<br> photon
HACTEHA [7]

Answer:

Photon

Explanation:

Electrons don't weigh very much at all, and don't account for the chemical mass of an element. However, Photons don't have ANY mass.

3 0
3 years ago
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