Contact And Non-contact Forces (GCSE Physics)

On a vertical rope holding a lamp, which statement is true about the contact force in the rope?

A teacher uses a Van de Graaff generator so a pupil’s hair stands up. The teacher then brings a grounded metal object close and a spark jumps. Which two reasons explain why the spark occurs?

A person stands on an insulating platform and touches a charged dome. Why is there no dangerous current through the person when the dome has low voltage (small potential difference) relative to ground?

A textbook rests on a table. Which force pairs act on the textbook and are equal in magnitude when it is at rest?

A metal ball hangs on an insulating thread near a charged rod; it is attracted but does not touch. If you now earth the ball, what happens and why?

A point force that acts where two objects touch (for example friction or normal reaction) is called a contact force. Which of the following is a contact force?

Which of the following is NOT a non-contact force?

A car parked on a slope has a tendency to slide down. Which two forces must be present for the car to be in static equilibrium on the slope?

A small permanent magnet is brought near a piece of iron and the iron becomes temporarily magnetised. What type of magnet is the iron while it is magnetised?

When you rub a plastic rod with a cloth and the rod becomes negatively charged, what has happened at the electron level?

A small object of mass m is held at rest in air by a string. Which diagram of forces correctly lists the two vertical forces acting on the object and their directions?