Question

You and your younger sister (who weighs half as much you do) are at a skating rink. You are both wearing roller skates and are facing each other. What will happen to your and your sister's motion if you push against each other?

Question 1 options:

You move forward and your sister moves backward at a faster rate.


You both move forward, but you accelerate at a greater rate.


You move backward and your sister moves forward at a faster rate.


You both move backward but your sister accelerates at a greater rate.

Question 2 (1 point)
You are standing, completely still, on a completely flat floor. Why do you stay as you are instead of flying into the air?

Question 2 options:

There are no forces acting on you or the floor.


Forces are only acting on the floor.


All of the forces acting on you are balanced.


You are exerting an unbalanced force on the floor.

Question 3 (1 point)
A baseball is thrown at 90 mph from east to west over a distance of 60 ft. What is true of the ball's motion?

Question 3 options:

Its speed is 90 mph to the west.


Its acceleration is 30 mph.


Its velocity is 90 mph to the west.


Its acceleration is 150 mph.

Question 4 (1 point)
A box is pushed 7 m to the left in 3 s. What is the block's average speed to the nearest tenth?

Question 4 options:

2.33 m/s


0.43 m/s


2.3 m/s


0.4 m/s

Question 5 (1 point)
graph

On a graph of distance vs. time, what is true of the motion of the object during its first 6 m of travel?



Question 5 options:

The object was moving at a constant speed.


The object was accelerating.


The object was not moving.


The object was northbound.

Answer 1

Answer:

It is D

Explanation: Use of these terms stretches back to World War I. One American field order from September 1918 noted, “The First Army will attack at H-Hour on D-Day with the object of forcing the evacuation of the St. Mihiel salient.” Other nations had their own shorthand. In World War I, the French used the code date “le Jour J,” while the British called their operation start days “Z-Day” and “Zero Hour.”

Hope this helps

Answer 2

You and your younger sister (who weighs half as much you do) are at a skating rink. You and your sister's both move backward but your sister accelerates at a greater rate.

What is acceleration?

The time rate of change of velocity with time.

As both are holding each other, they will be pushed backwards because the skating they wear makes them to move backwards. The equal and opposite force is applied on each other.

The force F =mass x acceleration.

The lesser mass greater will be the acceleration. Your sister with half weight of yours will accelerate more.

Thus, you and your sister's both move backward but your sister accelerates at a greater rate.

Learn more about acceleration.

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