Tag: motion and measurement

Quizzes (11) Questions (114)

Questions Related to motion and measurement

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

Which of the Quantity consists of unit as kg-m/sec ?

  1. Speed

  2. Momentum

  3. Acceleration

  4. Impulse
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Explanation

1.  For Speed :

    $v = \dfrac{distance}{time} = m/sec$

2. For Momentum : 
   $P = m \times v$

   Units :  $kg - m/ sec$

3. For Acceleration :
    $a = \dfrac{\Delta v}{\Delta t}=m/{sec}^2$

4. For Impulse :
    $I =F\times \Delta t = \Delta p$
     Units : $N-sec  = (kg-m/{sec}^2) \times sec = kg-m/sec$

From above we can say that $Momentum$ and $Impulse$ have same unit as kg-m/sec.
      

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

The unit kg $m^2s^{-2}$ is associated with

  1. Work

  2. Kinetic energy

  3. Potential energy

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$kgm^2s^{-2}$ is the unit of energy. It's dimension is $[ML^2T^{-2}]$ All the quantities given in the option are different form of energy. So their units will be same. Then the unit $kgm^2s^{-2}$ is associated with all of the options.

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

The 'rad' is the correct unit used to report the measurement of

  1. the rate of decay of radioactive source

  2. the ability of a beam of gamma ray photons to produce ions in a target

  3. the energy delivered by radiation to a target

  4. the biological effect of radiation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rad is the unit of absorbed dose of ionizing radiation. One rad is equal approximately to the absorbed dose delivered when soft tissue is exposed to one-roentgen of medium-voltage radiation. Thus this is the bilogical effect of radiation.

Multiple choice physics motion and measurement physical quantities units - definitions and systems physical quantities like mass and weight

Which of the following statements below should be followed while using the symbol for a unit of a physical quantity?

  1. The symbol named after scientist should have capital letter.

  2. They take plural forms.

  3. They can be written in full.

  4. They should be written only in the agreed symbols.
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
Explanation

1. They symbol named after scientist should have the capital letter, 

2. They can be written in full 
3. They should be written only in the agreed symbols be used while using the symbol for a unit of a physical quantity. 
4. They cannot take plural forms.