Tag: dynamics - explaining motion

Quizzes (15) Questions (91)

Questions Related to dynamics - explaining motion

Multiple choice physics dynamics - explaining motion summary of si units fundamental quantities system of units

$1 N = Z  kgf$ (approx.), then what is the value of $Z$?

  1. 0.1

  2. 1

  3. 10

  4. 0
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The kilogram-force (kgf or kgF) is a gravitational metric unit of force. It is equal to the magnitude of the force exerted by one kilogram of mass in a $10\ ms^{-2}$ gravitational field (standard gravity, a conventional value approximating the average magnitude of gravity on Earth).Therefore one kilogram-force is by definition equal to 10 N

So 1 kgf=10N
hence 1N=0.1 kgf  , Z=0.1

Multiple choice physics dynamics - explaining motion system of unit summary of si units system of units

If 1 kg wt = 10 N, the value of gravitational intensity will be 

  1. $\displaystyle 10{ m }/{ { s }^{ 2 } }$
  2. $\displaystyle \frac { 1 }{ 10 } { m }/{ { s }^{ 2 } }$
  3. $\displaystyle 1{ m }/{ { s }^{ 2 } }$
  4. $\displaystyle \frac { 1 }{ 100 } { m }/{ { s }^{ 2 } }$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If $1\,kg\,wt=10\,N=F$

Then gravitational intensity is given by,
$g=\dfrac Fm$
$=\dfrac{10 }{1}=10 m/s^2$

Multiple choice physics dynamics - explaining motion system of unit summary of si units system of units

The magnetic field flux is expressed in

  1. Dynes

  2. Oersted

  3. Gauss

  4. Weber
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Magnetic Flux is defined as the number of magnetic field lines passing through a given closed surface. It gives the measurement of the total magnetic field that passes through a given surface area. S.I. unit of magnetic flux is Weber $(Wb)$.

Multiple choice physics dynamics - explaining motion system of unit summary of si units system of units

Which of the following class of forces is different from others?

  1. Pulling of a cart

  2. Stretching of a coiled spring

  3. Kicking of a football

  4. Electrical force
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pulling of a cart, stretching of a coiled spring and kicking of a football take place due to contact forces. A contact force is any force that requires contact to occur. But electrical force is a non contact force which acts on an object without coming physically in contact.