A Level Physics

A car travels at a constant speed around a flat circular track. Which diagram correctly represents the direction of the car's velocity and the direction of the centripetal force acting on the car?

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Tags

NGSS.HS-PS2-1

Satellites stay in orbit around the Earth because a centripetal force prevents them from moving in a straight line. This force is provided by _?_.

• gravity

• tension

• inertia

• the radius

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A model car moves in a circular path of radius 0.80m at an angular speed of π/2 rad s^-1 . What is its displacement from point P 6.0 s after passing P?

• Zero

• 0.4 π m

• 1.6 m

• 1.6 π m

A small mass is placed at P on a horizontal disc which has its centre at O. The disc rotates anticlockwise about a vertical axis through O with constant angular speed. Which one of the following describes the force which keeps the mass at rest relative to the disc when in the position shown?

• the weight of the mass

• a frictional force from P to Q

• a frictional force directed away from O

• a frictional force directed towards O

Tags

NGSS.HS-PS2-1

A 0.20 kg mass is whirled round in a vertical circle on the end of a light string of length 0.90 m. At the top point of the circle the speed of the mass is 8.2 ms^-1 . What is the tension in the string at this point?

• 10 N

• 13 N

• 17 N

• 20 N

Tags

NGSS.HS-PS2-1

The purple ball is rolling counterclockwise around a track with uniform circular motion. Which vector represents the direction of the acceleration of the ball?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

The Earth spins around an internal axis or point of rotation. This type of circular motion is known as _?_.

• Revolution

• Rotation

• Radius

• Orbit

Tags

NGSS.MS-ESS2-6

The Earth travels around the sun. This type of nearly circular motion is known as _?_.

• Revolution

• Rotation

• Radius

• Translational

Tags

NGSS.HS-ESS1-4

A string passes through a smooth thin tube. Masses m and M are attached to the ends of the the string. The tube is moved so that the mass m travels in a horizontal circle of constant radius r and at a constant speed v. Which of the following expressions is equal to M?

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

In a situation like this, how do we calculate the electric field strength between the plates?

• E = FQ

• E = V . d

• E = - ΔV/Δd

• E = 1/2 CV²

Tags

NGSS.HS-PS3-5