General Physics

The differentiation of velocity with respect to time gives

• Velocity square

• Acceleration

• Distance

• Velocity/2

The value of unified mass unit in kg is

• 1.67x10 to the power of -27 kg

• 1.67x10 to the power of 27

• 1.67x10 to the power of 16

• 1.67x10 to the power of-16

What is the velocity of a function in t f(t) = 2t²+7t-1 at t=5sec

• 17m/s

• 27m/s

• 25m/s

• 10m/s

The time period of a simple pendulum of length 1 m is

• 1 sec

• 2 sec

• 3 sec

• 4sec

The angle between the vector î and x axis is

• 90

• 0

• 45

• 60

The maximum height of a projectile is

• U²sin²∅/2g

• U²cos²∅/2g

• U²tan²∅/2g

• U²sin∅/2g²

The time period of a simple pendulum is

• T=2π×l/g²

• T=2π×lg

• T=2π×√l/g

• T=2π×√l/g²

Hot Liquids flow faster than cold liquids because of

• Viscosity

• Surface tension

• Piscosity

• Adativity

Which of the following substances doesn't contract on heating

• Iron

• Cast iron

• Silica glass

• Rubber

Why are gaps left between the rails of the railway track

• To pass air

• To allow thermal expansion

• To allow thermal conductivity