Motion
A car starts from rest and accelerates at 4 m/s² for 5 seconds. What is its final velocity?
Answer: 20 m/s
A 10 kg object accelerates at 2 m/s². What net force acts on it?
Answer: 20 N
How much kinetic energy does a 2 kg object moving at 6 m/s have?
Answer: 36 J
A sound wave has a frequency of 200 Hz and wavelength of 2 m. What is its speed?
Answer: 400 m/s
A mirror forms an image 2 m behind the mirror. How far is the object from the mirror?
Answer: 2 m
An object travels at 12 m/s for 15 seconds. How far does it travel?
Answer: 180 m
A 50 N force acts on a 5 kg object. What is its acceleration?
Answer: 10 m/s²
A force of 50 N moves an object 8 m. How much work is done?
Answer: 400 J
A wave travels at 330 m/s and has frequency 110 Hz. What is its wavelength?
Answer: 3 m
A light ray hits a mirror at an angle of incidence of 35°. What is the angle of reflection?
Answer: 35°
A bike slows from 25 m/s to 10 m/s in 3 seconds. What is its acceleration?
Answer: −5 m/s²
A 1200 kg car accelerates at 3 m/s². Calculate the net force.
Answer: 3600 N
A 5 kg object is lifted 12 m. Using g = 10 m/s², what gravitational potential energy is gained?
Answer: 600 J
A sound wave has wavelength 0.5 m and speed 340 m/s. What is its frequency?
Answer: 680 Hz
A wave has frequency 10 Hz and wavelength 3 m. What is its speed?
Answer: 30 m/s
A ball is dropped from rest and falls for 4 seconds. Using g = 9.8 m/s², what is its final velocity?
Answer: 39.2 m/s downward
A 15 kg box is pushed with 90 N while friction opposes with 30 N. What is the acceleration?
Answer: 4 m/s²
An object has 980 J of GPE at a height of 20 m. What is its mass? Use g = 9.8 m/s².
Answer: 5 kg
A person hears an echo 2 seconds after shouting. If sound travels at 340 m/s, how far away is the wall?
Answer: 340 m
A light ray reflects off two perpendicular mirrors. By how many degrees is its direction changed overall?
Answer: 180°
A runner accelerates from 3 m/s to 15 m/s over 24 m. What is the acceleration?
Answer: 4.5 m/s²
Two forces of 45 N east and 25 N west act on an object with mass 5 kg. What is the acceleration and direction?
Answer: 4 m/s² east
A 1000 W motor works for 15 seconds. How much energy is transferred?
Answer: 15 000 J
A wave’s frequency doubles while speed stays constant. What happens to the wavelength?
Answer: It halves
A person stands 3 m from a mirror. How far does light travel from the person to the mirror and back?
Answer: 6 m