physics

Rate of change of displacement with respect to time is called

• Speed

• Deceleration

• Acceleration

• Velocity

Which of the following is a unit of eletric current:

Velocity is

• Scalar quantity

• hasn`t a direction

• Vector quantity

• has a direction

Speed has only magnitude , is it true?

• Yes

• No

When an object is in motion, it's ................... must change

• Shape

• Acceleration

• Size

• Position

Density is

• Volume times mass

• Mass times volume

• Volume divided by mass

• Mass divided by volume

Gravity

• is any interaction that, when unopposed, will change the motion of an object.

• is a force of attraction that exists between any two masses, any two bodies, any two particles.

• is a measurement of mass in motion: how much mass is in how much motion.

• F=GMm/r2

• F=GMmr2

What is defined as a force causing the movement—or displacement—of an object?

• Work

• Force

• Current

• Momentum

Heat is

• is transferred from one body to another as the result of a difference in temperature

• is a propagating dynamic disturbance (change from equilibrium) of one or more quantities

• the capacity for doing work

• Q=mcΔT.

• Q=cΔT

What is the stored energy in any object or system by virtue of its position or arrangement of parts?

• Potential energy

• Kinetic energy