Download App

Motion in One Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in One Dimension1 Mark
Question
Assertion : An object can have constant speed but variable velocity.
Reason : Speed is a scalar but velocity is a vector quantity.
✓

Answer

(a) Since velocity is a vector quantity, hence as its direction changes keeping magnitude constant, velocity is said to bechanged. But for constant speed in equal time interval distance travelled should be equal.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Assertion & Reason" from Motion in One Dimension→Motion in One Dimension — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Assertion : The scalar product of two vectors can be zero.
Reason : If two vectors are perpendicular to each other, their scalar product will be zero.
→
Assertion : Satellite is an ideal platform for remote sensing.
Reason : Satellite in polar orbit can provide global coverage or continuous coverage of the fixed area in geostationary configuration.
→
Assertion : The amplitude of an oscillating pendulum decreases gradually with time
Reason : The frequency of the pendulum decreases with time
→
Assertion : The permeability of a ferromagnetic material is independent of the magnetic field.
Reason : Permeability of a material is a constant quantity.
→
Assertion : Work and heat are two equivalent form of energy.
Reason : Work is the transfer of mechanical energy irrespective of temperature difference, whereas heat is the transfer of thermal energy because of temperature difference only.
→
Assertion : If two objects of different masses have same momentum, the lighter body possess greater velocity.
Reason : For all bodies momentum always remains same.
→
Assertion : Zeroth law of thermodynamic explain the concept of energy.
Reason : Energy is dependent on temperature.
→
Assertion : Zener diode works on a principle of breakdown voltage.
Reason : Current increases suddenly after breakdown voltage.
→
Assertion : The radiation from the sun's surface varies as the fourth power of its absolute temperature.
Reason : The sun is not a black body.
→
Assertion : A force act upon the earth revolving in a circular orbit about the sun. Hence work should be done on the earth.
Reason : The necessary centripetal force for circular motion of earth comes from the gravitational force between earth and sun.
→