Practice Conceptual Physics chapter 4

Physics!!!!

A deep space probe travels in a straight line at a constant speed of over 16,00 m/s. Assuming there is no friction in space, if a loose part were released from the spacecraft without a push in any direction, what would happen to it?

It would continue along with the spacecraft

What is not an example of Newtons first law of motion?

a rocket engine accelerates a spacecraft along its trajectory

A worker pushes a box across the floor to the right at a constant speed with a force on 25N. What can you conclude about the box?

Friction between the box and floor is 25N to the left

Newtons first law of motion is also known as?

the law of inertia

What is Newtons first law of motion?

An object will remain at rest or continue moving in a straight line with a constant speed unless acted on by an unbalanced force

A ball is sitting at rest on the floor. What will happen if a balanced force is applied to the ball?

It will remain at rest

The motion of an object thrown in outer space best demonstrates that an object will...

continue moving in a straight line at constant speed forever unless acted on by an unbalanced force

you risk getting lost in space due to very low

friction

an object is moving at a constant speed in a straight line. Which of the following would cause it to move differently

It is acted on by unbalanced forces

A ball is rolling across the floor at a constant speed. What will happen to the ball if it is exposed to an unbalanced force in the same direction that it is moving

Its speed will increase

an object travels through deep space in a straight line at constant speed. Its inertia could change if...

its mass changes

A car is traveling east at a constant speed along a straight road. Which of the folllowing can you conclude about the car?

Balanced forces are acting on the car

Based on newton's first law of motion, which of the following describes the action of an unbalanced force on a car?

a car that is braking

In deep space, an object is traveling at constant speed in a straight line. then it is observed to change its direction of travel. what can the observer conclude?

the forces acting on the object must have changed

A boy sits motionless partway down a playground slide. The force of friction balances the force of gravity. a girl hands the boy a book. Why does the boy still not move?

The force of friction and the force due to gravity increase together. Friction and gravity are still balanced

Subject to Newtons first law

some fuel spilled from and orbiting spacecraft and driver is not wearing a seat belt during a car crash

Gravity prevalling

Flower vase falling from a balcony

Friction prevalling

Billard ball unluckily stopping near the corner hole

Thrust acceleration prevalling

aircraft running for takeoff and orbiting satellite travels back to earth