Kinematics All subtopics
A student walks 80 m east, then 50 m west, and finally 30 m east. Which row correctly gives both the total distance traveled and the magnitude of the displacement?
Which of the following quantities is a vector?
An object travels in a straight line and returns exactly to its starting position. Which statement correctly describes the object’s distance and displacement?
A physics student says, “My velocity is −6 m/s, so I must be slowing down.” What is the correct interpretation of the negative sign?
Three forces act on a box along a single axis. Taking rightward as positive: F₁ = +10 N, F₂ = −6 N, and F₃ = −7 N. What is the net force on the box?
A delivery drone flies 120 m north, 200 m south, and then 40 m north. Taking north as positive, what is the drone’s displacement?
A train moves at a constant velocity of −25 m/s along a track where eastward is defined as positive. Which statement is correct?
A student is asked to represent a 6 N force pointing left and a 10 N force pointing right as vector arrows on the same axis. Which description of the arrows is correct?
During a soccer match, a midfielder runs 30 m toward the opponent’s goal and then 30 m back to her original position. Her coach records her average speed during this sequence as 5 m/s. What is her average velocity for this sequence?
A rescue helicopter lowers a package with a velocity of −4 m/s (taking upward as positive) while a gust of wind exerts an upward force of +15 N and gravity exerts a downward force of −25 N on the package. A student claims that because the velocity is negative, the net force must also be negative. Is the student’s reasoning valid, and what is the actual net force?
Which pair of quantities consists of one scalar and one vector?
Two students argue about how to find the resultant of a 7 N force to the right and a 7 N force to the left along the same axis. Student X says the resultant is 14 N; Student Y says the resultant is 0 N. Which student is correct and why?
A delivery drone flies 500 m north, then 200 m south, and finally 100 m north. Taking north as positive, determine the displacement of the drone from its starting position.
A jogger runs 600 m east and then 600 m west, returning to her starting point. The entire trip takes 200 s. Calculate her average speed and her average velocity.
A train travels 54 km south in 0.75 hours, then 18 km north in 0.25 hours. Taking south as positive, calculate the average velocity of the train for the entire journey in m/s.
A skateboarder moving at +8.0 m/s reaches a downhill slope and accelerates to +14.0 m/s over 3.0 s. Calculate the average acceleration of the skateboarder during this interval.
An object has a velocity of −12.0 m/s and an acceleration of +4.0 m/s². Determine whether the object is speeding up or slowing down, and state the object’s velocity after 2.0 s.
The object model in physics treats a real object as a point particle. Which property is discarded when applying this model?
A car drives 240 m east in 12 s. It then immediately reverses and drives 80 m west in 8 s. Taking east as positive, calculate the car’s average velocity and average speed for the entire trip.
A spacecraft in orbit moves at a constant speed of 7 700 m/s while continuously changing direction around Earth. A student claims the spacecraft has zero acceleration because its speed is constant. Evaluate this claim.