GAT Subject Physics MCQs

A surface exerts a normal force on an object in contact with it.
Its magnitude is not always equal to weight.

Friction acts tangentially at a contact surface.
It may be static or kinetic.

Average velocity is a vector based on net displacement.
A round trip can have zero average velocity.

Slope gives change in displacement per unit time.
That is the definition of velocity.

Slope gives change in velocity per unit time.
That is acceleration.

Integrating velocity over time gives displacement.
Areas below the time axis count as negative displacement.

One metre equals 100 centimetres.
Therefore 250 cm ÷ 100 = 2.5 m.

Percentage uncertainty is absolute uncertainty divided by measured value times 100.
0.2/10.0×100 = 2%.

Percentage error is |48-50|/50×100.
The result is 2/50×100 = 4%.

Move the decimal four places to the right to obtain 7.2.
Therefore the exponent is -4.

Use the Pythagorean theorem for perpendicular components.
Magnitude = √(3²+4²)=5.

The x-component is A cosθ.
10 cos60° = 10×0.5 = 5.