8-SCIENCE

Which one is a vector quantity?

• Speed

• Distance

• Time

• Velocity

Which one is a scalar quantity?

• Distance

• Displacement

• Acceleration

• Force

What is the SI unit of speed?

• m/s²

• m/s

• m

• s/m

What happens when a body moves in uniform velocity?

• u > v

• v > u

• u = v

• u = 2

Which one of the following equation of motion is correct?

• u = v + at

• v = u - at

• v = u + at

• u = v - at

Which of the physical quantity can be calculated by using the formula

u + v

2

• Relative velocity

• Speed

• Average velocity

• Acceleration

What is the correct formula to calculate acceleration?

• u + v

  2

• v - u

  t

• v - u

  2

• u - v

  t

 If two bodies move in same direction, their relative velocity is equal to

• V_AB = V_A + V_B

• V_AB = V_A - V_B

• VAB =V_A X V_B

• VAB = VA $\div$    VB

What happens a body starts to move from rest?

• Its u = v

• Its u > v

• Its u = 0

• None of these

What is the SI unit of acceleration?

• m/s

• m

• m / s²

• None of these