Physics Equations

What is the formula to calculate speed?

• S = t/d

• S = d/t

• S = d x t

• S = t x d

Answer explanation

The correct formula to calculate speed (S) is S = d/t, where d is distance and t is time. This means speed is the distance traveled divided by the time taken.

Tags

NGSS.MS-PS3-1

Equation for acceleration

• a = v/t

• a = v x t

• a = d t

• a = d/t

Answer explanation

The correct equation for acceleration is a = v/t, where 'a' is acceleration, 'v' is velocity, and 't' is time. This formula shows that acceleration is the change in velocity over time.

Unit for acceleration

• m

• m/s²

• m/s

• kgm/s

Answer explanation

Acceleration is defined as the rate of change of velocity per unit time. Its unit is meters per second squared (m/s²), which indicates how much the velocity changes in meters per second for each second.

Tags

NGSS.MS-PS2-2

Unit for speed

• m

• m/s²

• m/s

• kgm/s

Answer explanation

The correct unit for speed is m/s, which represents meters per second. Other options like m/s² denote acceleration, while m is a unit of distance and kgm/s is not a standard unit for speed.

Tags

NGSS.MS-PS3-1

What is the formula for kinetic energy?

• 0.5 × mass × (speed)²

• mass × gravitational field strength × height

• 0.5 × spring constant × (extension)²

• mass × specific heat capacity × temperature change

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Which equation represents power in terms of work done?

• energy transferred / time

• work done / time

• useful output energy transfer / total input energy transfer

• useful power output / total power input

What is the formula for efficiency in terms of power?

• energy transferred / time

• work done / time

• useful output energy transfer / total input energy transfer

• useful power output / total power input

What is the formula for energy transferred in terms of power?

• power × time

• charge flow × potential difference

• mass / volume

• mass × specific heat capacity × temperature change

What is the formula for weight?

• W = mg

• W = Fd

• W = ½mv²

• W = kx

How is work done calculated?

• W = Fd

• W = mgh

• W = ½mv²

• W = kx

Tags

NGSS.HS-PS2-1