Physics Quiz - 1st and 2nd Term

Which of the following is not a vector quantity?

• Speed

• Velocity

• Force

• Acceleration

The resultant of two forces X and Y will be greatest when the angle between X and Y is _____

• 00

• 900

• 450

• 1800

Two forces whose resultant is 100N, are perpendicular to each other. If one of them makes an angle of 600 with the resultant. Calculate its magnitude [Sin 600 = 0.8660, Cos 600 = 0.5000]

• 200.0N

• 173.2N

• 86.6N

• 115.5N

The S.I Unit of the moment of a force is

• kgm

• Nm

• Jm

• Nm²

Three non-parallel forces which can be represented both in magnitude and direction by the three sides of a triangle, taken in order, can ____

• make a body oscillate

• make a body rotate

• keep a body in equilibrium

• move a body in straight line

Two forces A and B act at a point at right angles. If their resultant is 50N and their sum is 70N, their magnitudes are ____

• 50N and 20N

• 20N and 40N

• 40N and 30N

• 60N and 10N

Which of the following combinations will increase the stability of an object

• wide base and low C.G

• Narrow base and low C.G

• Narrow base and high C.G

• Wide base and high C.G

For a projectile projected at Ɵ0 to the horizontal with a velocity U is given by ____

• 600

• 300

• 450

• 750

A stone is projected at an angle of 600 and an initial velocity of 20m5-1. What is the time of flight?

• 34.65

• 3.465

• 1.73

• 17.35

The range of a projectile projected at Ɵ0 to the horizontal with a velocity, U is given by

• U2sin2Ɵ

• U2sin2Ɵ

• 2U2sin2Ɵ

• U2Cos2Ɵ