Question

1.imagine you were able to throw a ball in a frictionless environment such as outer space.once you let go of the ball,what will happen to the ball according to the law of inertia?

a.it will travel in a straight forever line
b.it will travel striaight line but eventually slow down
c.it will continue to speed up forever
d.it will slow down and turn
2.a car accelerates down the road .what is the reaction to the tires pushing on the road?
a.the car in the tires moving the car
b.the masses of the car pushing on the tires
c.the road pushing on the tires
d.the road moving away from the tires

Answer 1

Imagine you were able to throw a ball in a frictionless environment
such as outer space. Once you let go of the ball, it will travel forever
in a straight line, and at a constant speed. (At least until it bumps into
something.)

A car accelerates down the road. The reaction to the tires pushing
on the road is the road pushing on the tires.

Answer 2

In outer space, a ball thrown in a frictionless environment will continue in a straight line forever, and the reaction to car tires pushing on the road is the road pushing back on the tires.

In a frictionless environment such as outer space, if you let go of a ball according to Newton's first law of inertia, the ball will travel in a straight line forever unless acted upon by an outside force. So, the correct answer to the first question is (a) it will travel in a straight line forever.

For the second question, when a car accelerates down the road, the reaction to the tires pushing on the road is the road pushing back on the tires with an equal and opposite force, in accordance with Newton's third law. Therefore, the correct answer to the second question is (c) the road pushing on the tires.