velocity
On a distance v. time graph, where is the velocity found?
slope
On a velocity v. time graph, where is the acceleration found?
slope
What kind of motion do unbalanced forces cause?
acceleration
What is momentum?
mass x velocity
What does the law of conservation of energy mean?
An object in a closed system cannot gain or lose energy.
Zoe travels 40 meters in 35 seconds. what is her speed in meters per second?
1.1 m/s
A car going down hill speeds up from 3.3 m/s to 7.5 m/s in 2.7 seconds. What is its acceleration?
1.6 m/s2
A ball rolls past you. Use one of Newtons laws to describe why.
Newtons first law says objects in motion stay in motion.
What is meant by the law of conservation of momentum?
The total momentum before a collision must be equal to the total momentum after.
A 6kg mass is 5.7 m high. What is its potential energy?
340 J
Nia travels 22 m/s for 3.5 seconds. How far did she travel?
77m
A car slam on the brakes and goes from 6.7 m/s to 2.4 m/s in 5.1 seconds. What is its acceleration?
- 0.84 m/s2
Use one of Newtons laws to describe how objects start moving.
Newtons second law tells us that enough unbalanced force will cause an object to accelerate.
If a person has a mass of 40 kg and a velocity of 3 m/s what is their momentum?
120 kg m/s
A 5 kg mass travels at 3 m/s for a distance of 7m. What is its kinetic energy?
120 J
Jocelyn travels at 5.2 m/s for 6 meters. How long did this take?
1.2 s
What is the acceleration of gravity (how much)?
g = 9.8 m/s2
If I kick a chair, what does Newtons 3rd law say the reaction is?
Chair kicks me back
If a car has a mass of 40 kg and a momentum of 500 kg m/s, what is their speed?
13 m/s
A ball has 475 Joules of potential energy at the top of a cliff that is 9m high. If it falls to the bottom, how much kinetic energy will it have just before striking the earth?
475 Joules of kinetic energy
Armisha travels 300 meters in 2 minutes. What is her speed in m/s?
2.5 m/s
If the acceleration of gravity is 9.8 and an object falls for 3 seconds from rest, what would its final velocity be?
29 m/s
A 4N force east and a 6 N force west pull on a 10 box. What will the boxes acceleration be (include direction)?
a = 0.2 m/s2 west
If a 4kg marble going 6 m/s hits a 6kg marble going 2 m/s the same direction and after the collision the 4kg marble rolls off at 2 m/s, what is the speed of the other marble?
4.7 m/s
A 6 kg ball is held 7m high. If it is dropped, what will its velocity be according to the law of conservation of energy?
12 m/s