Physics Flashcards
- A teapot is at rest on a table. The teapot exerts a force of 10 N on the table. What force does the table exert on the teapot?
-10 N
The magnetic field produced when current flows through a wire…
goes round the wire in circles centred on the wire.
Which of these quantities is not a vector?
Speed
The magnetic field inside a solenoid is..
strong and uniform.
Which of the following electromagnetic waves has the lowest frequency?
Infrared
A car is travelling at 30 mph. Which of the following is a sensible estimate for the stopping distance of the car?
25 m
Which of the following is a magnetic material?
Nickel
What is the ‘normal’ on a ray diagram?
A line drawn at 90° to a surface at the point where a wave hits the boundary
True or False? Mass is the force acting on an object due to gravity.”
False
A car accelerates from 0 m/s to 10 m/s in 2 s. What is the average acceleration of the car?
5 m/s2
A resultant force of 4 N acts on a 2 kg mass. What is the acceleration of the mass?
2 m/s2
Which of these is an example of a longitudinal wave?
Sound waves
If the resultant force acting on a moving object is zero, the object will…
keep moving at a steady speed.
What units are used for wave speed?
Metres per second, m/s
True or False? “A plotting compass tells you the strength of a magnetic field.”
False
