Question

9 multiple choice 1 point a lovebug hits the windshield of a car driving 40 km/h. which force is greater? the windshield hitting the bug the forces are equal the bug hitting the windshield the forces change after impact clear my selection 10 multiple choice 1 point space is a vacuum, meaning that there is no air particles, etc. how does a rocket accelerate in space. its complicated burning fuel and expelling exhaust in the opposite direction of desired motion it cannot; there is nothing against which to push another rocket must come and push it clear my selection 11 multiple choice 1 point if there is no net force acting on an object, the object will change its direction of motion

Explanation:

• For question 9, according to Newton's third - law of motion, for every action, there is an equal and opposite reaction. So the force of the windshield hitting the bug and the force of the bug hitting the windshield are equal.
• For question 10, a rocket accelerates in space by burning fuel and expelling exhaust in the opposite direction of the desired motion, based on Newton's third - law of motion.
• For question 11, according to Newton's first - law of motion (the law of inertia), if there is no net force acting on an object, the object will maintain its state of motion, either at rest or moving with a constant velocity, and will not change its direction of motion or accelerate.

Answer:

1. The forces are equal
2. burning fuel and expelling exhaust in the opposite direction of desired motion
3. maintain its state of motion (neither change its direction of motion nor accelerate)