Motion and Forces — Test Answers

Based on the graph of velocity over time, which could be the initial velocity and the final velocity for this graph?

Which object requires the greatest change in momentum in order to stop its motion?

An object has a mass of 5 kilograms What force is needed to accelerate it at 6 the fraction with numerator m and denominator s squared ? (Formula: cap f is equal to ma )

Which example best represents balanced forces?

A bicycle has a momentum of 36 kilograms times m over s and a velocity of 4 meters per second What is the mass of the bicycle?

Which refers to the sum of all the forces that act upon an object?

Newton’s first law of motion was a giant leap forward in scientific thought during Newton’s time. Even today, the idea is sometimes difficult at first for people to understand. Which statement is the best example of an object and motion that would make it hard for people to accept Newton’s first law?

A skydiver falls toward the ground at a constant velocity. Which statement best applies Newton’s laws of motion to explain the skydiver’s motion?

Which does a reference point provide?

Micah knows that a car had a change in velocity of 15 meters per second What does Micah need to determine acceleration.

Anya knows the velocity of an object. What else does she need to know in order to find the object’s momentum?

Which describes what a velocity/time graph would look like with no acceleration?

Which statement can be supported by using a position-time graph?

Jerome solves a problem using the law of conservation of momentum. What should Jerome always keep constant for each object after the objects collide and bounce apart?

What is most often given a value of zero to describe an object’s position on a straight line?

Which would be represented by cap f sub cap n on a force diagram?

If forces acting on an object are unbalanced, the object could experience a change in ________.

Hunter’s velocity was 4.5 meters per second At the end of his race, his velocity was the same. Which best describes his movement?

When discussing Newton’s laws of motion, which terms do people most likely use when talking about Newton’s third law of motion?

Olivia places her pet frog on a line to observe the frog’s motion. The line is divided into sections that measure 1 centimeter each. The frog begins at 0, moves 18 centimeters forward, moves 6 centimeters backward, and then 12 centimeters backward. What is the frog’s displacement?