Which of the following best describes the velocity-time graph for an object moving with uniform velocity?
A straight horizontal line parallel to the time axis
A velocity-time (v-t) graph plots velocity on the vertical axis against time on the horizontal axis. Two features of such a graph carry physical meaning: the slope of the line equals the acceleration of the object, and the area under the line equals the displacement covered.
For an object moving with uniform (constant) velocity, the velocity has the same value at every instant — it neither increases nor decreases. When a quantity does not change with time, its graph against time is a straight horizontal line parallel to the time axis. This is the correct choice.
You can confirm it using the slope idea: a horizontal line has zero slope, and zero slope means zero acceleration, which is exactly the condition for uniform velocity.
The other shapes represent different kinds of motion:
- A straight line sloping upward from the time axis (starting above the origin) shows velocity steadily increasing — that is uniform acceleration with some initial velocity, not constant velocity.
- A line starting from the origin and sloping upward also shows uniform acceleration, but starting from rest (initial velocity zero).
- A curved line above the time axis shows a changing slope, meaning the acceleration itself is changing — that is non-uniform acceleration.
Similar Questions
A construction worker needs to lift a heavy metal beam using a lever but has a limited length of plank. Which adjustment would allow the worker to lift the beam with the least effort if the position of the fulcrum can be changed but the plank length remains constant?
A student pushes a heavy box that is already moving across a rough floor. If the force applied by the student is exactly equal to the frictional force opposing the motion, what will happen to the box?
Which of the following best describes the velocity-time graph for an object moving with uniform velocity?
Which of the following best describes how sound travels through air?
A factory plans to install a powerful electromagnet for lifting metal scraps. To maximize the magnetic field strength around the coil, which of the following combinations would be most effective?
Which experimental discovery contradicted Thomson's model of the atom and led to its rejection?
Which of the following statements best describes the behavior of magnetic field lines around a straight current-carrying conductor?
A construction worker needs to lift a heavy metal beam using a lever but has a limited length of plank. Which adjustment would allow the worker to lift the beam with the least effort if the position of the fulcrum can be changed but the plank length remains constant?
A student pushes a heavy box that is already moving across a rough floor. If the force applied by the student is exactly equal to the frictional force opposing the motion, what will happen to the box?
Which of the following best describes the velocity-time graph for an object moving with uniform velocity?
Important Questions from Physics
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?
Ozone at the higher level of the atmosphere is a product of ______ acting on oxygen molecules.
