Average Velocity and Motion Concepts

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What is the average velocity of an automobile that travels a distance of 45 km in 0.25 h?

135 km/h

90 km/h (correct)

112.5 km/h

180 km/h

If a racecar driver is driving at 110 meters per second for 3 seconds, and a person is driving at 100 km per hour for 15 minutes, who drove farther?

Both drove the same distance

The person driving at 100 km/h

Not enough information to determine

The racecar driver (correct)

What is the slope of a velocity-time graph?

Acceleration (correct)

Speed

Distance

Momentum

A skater uniformly decreases her speed from 7 m/s to zero over a distance of 5 m. What would be her acceleration?

-3.5 m/s² Signup and view all the answers

What happens to the acceleration of an object if it maintains a constant speed while turning?

Acceleration is present due to a change in direction Signup and view all the answers

What happens to the inertia of an object if its mass is doubled?

Inertia is doubled Signup and view all the answers

According to Newton's First Law, what occurs if there is no net force acting on an object?

The object will remain at rest or continue moving at a constant speed Signup and view all the answers

Which statement correctly describes force in relation to Newton's Second Law?

For a constant force, increasing mass decreases acceleration Signup and view all the answers

If a soccer ball is kicked and then stops moving due to friction, which statement is true about its initial motion?

It continues to move due to inertia until a net force acts on it Signup and view all the answers

Given a 10 kg dog experiencing a pull force of 2 N, what is its acceleration?

0.2 $m/s^2$ Signup and view all the answers

How will the acceleration be affected if two objects experience the same force, but one has four times the mass of the other?

The heavier object will have one-fourth the acceleration Signup and view all the answers

What is the mass of an object that weighs 91.6 N on Earth?

9.34 kg Signup and view all the answers

Which of the following statements best describes inertia?

Inertia is the resistance of an object to changes in its state of motion Signup and view all the answers

According to Newton's First Law, what must be true for an object to maintain its state of motion?

There must be no net external force acting on it. Signup and view all the answers

What is the trajectory shape of a projectile under the influence of gravity?

A parabolic curve. Signup and view all the answers

When an object is thrown upwards, what happens to its vertical velocity at the highest point of its trajectory?

It becomes zero. Signup and view all the answers

What does the coefficient of friction depend on?

The surfaces in contact and the forces acting on them. Signup and view all the answers

If a sled is being pulled at constant speed with a force of 10 N, what can be inferred about the frictional force acting on it?

It is equal to 10 N. Signup and view all the answers

When a runner with a weight of 800 N accelerates at 5 m/s², what is the minimum coefficient of friction required to avoid slipping?

0.63 Signup and view all the answers

What is the relationship between the force of gravity and the acceleration due to gravity?

The force of gravity causes acceleration due to gravity. Signup and view all the answers

In order to determine the potential energy gained when raising a mass, which factors must be considered?

Mass, height, and gravitational acceleration. Signup and view all the answers