Exams › NEET › Physics

If x = a + bt², where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is:

1. km/s
2. km/s²
3. km/s³
4. kms²

Correct answer: km/s²

Solution

In x = a + bt², both a and bt² must have the same unit as x, which is kilometers. Because t² has units of s², b must have units of km/s² so that b·t² becomes km.

Related NEET Physics questions

• \( \mathbf{1}^{o} \boldsymbol{A} \) is
• Which of the following is different from the rest?
• Assertion nm is not same as mN Reason \( \ln m=10^{-9} m \operatorname{and} 1 m N=10^{-3} N \)
• If the dimension of a physical quantity is given by \( \left[M^{a} L^{b} T^{c}\right] \) then the physical quantity will be
• In a new system, unit of mass is \( 10 \mathrm{kg} \) unit of length is \( 5 \mathrm{m} \) and unit of time is 10s. Then in the new system 5N is equal to :
• A cube has a side of length \( 2.342 m \). The surface area and volume in correct significant figures are respectively:

⚔️ Practice NEET Physics free + battle 1v1 →