Speed, Acceleration and Centripetal Acceleration

The combined mass of a race car and its driver is 600 kg. Travelling at constant speed, the car completes one lap around a circular track of radius 160 m in total time of 36 s. What is the magnitude of the centripetal acceleration of the car?

• 0.17 m s^-2

• 4.9 m s^-2

• 78 m s^-2

• 100 m s^-2

An aeroplane is circling in the sky at a speed of 150 m s⁻¹. The aeroplane describes a circle of radius 20,000 m.

For a passenger of mass 80 kg inside this aeroplane, calculate her centripetal acceleration.

• 0.0075 m s⁻²

• 1.13 m s⁻²

• 7.5 m s⁻²

• 15 m s⁻²

Tags

NGSS.HS-PS2-1

The diagram shows a stone tied to the end of a length of string and is whirled round in a horizontal circle . What provides the centripetal force on the stone?

• The weight of the string.

• The friction in the string.

• The tension in the string.

• The air resistance from the surroundings.

Tags

NGSS.HS-PS2-1

A 0.50 kg object moves in a horizontal circular path with a radius of 0.25 m at a constant speed of 4 m/s. What is the magnitude of the object's acceleration?

• 8 m/s^2

• 16 m/s^2

• 32 m/s^2

• 64 m/s^2

Tags

NGSS.HS-PS2-1

A 1750 kg car travels at a constant speed of 15 m/s around a circle of 45 m. The magnitude of the centripetal force is:

• 5 N

• 583 N

• 8750 N

• 140 N

Tags

NGSS.HS-PS2-1

Calculate the centripetal force exerted on a 1200 kg car that goes around a 600 m radius curve at 20.0 m/s.

• 800 N

• 750 N

• 40 N

• 7 N

Tags

NGSS.HS-PS2-1

An object of mass 20 kg is in a circular orbit of radius 20 m at a velocity of 20 m/s. Calculate the centripetal force required to maintain this orbit.

• 200 N

• 300 N

• 400 N

• 500 N

Tags

NGSS.HS-PS2-1