Calculate Force
F = 3kg x 10 m/s
30N
p = 2kg x 14m/s
28 kgm/s
The law of inertia
Newton's 1st Law
The variable that represents momentum is
p
The downward force caused by Earth's mass
gravity
m = 30 N/15 m/s2
2 kg
v = (90 kgm/s)/2m
45 m/s
80 N = (40 kg)(2m/s2)
Newton's 2nd Law
The unit for momentum is
kgm/s
Gravity is one of ____ basic forces
4
What is the force of a 4 kg box moving with an acceleration of 12 m/s2
48 N
What is the momentum of a 60 kg skateboarder moving at a rate of 4m/s?
240 kgm/s
If a 450 N action force is exerted to the right the reaction force will be?
450 N left
A car rounding a curve is subject to ____ force
centripetal
Acceleration due to gravity is
9.8 m/s2
What is the acceleration of a wagon pushed with a force of 54 N and a mass of 6 kg?
9 m/s2
What is the mass of a turtle with a momentum 3 kgm/s and a speed of 2 m/s
1.5 kg
When one object exerts an equal and opposite force on another object they are called
action reaction forces
Momentum depends on which two factors
mass and velocity
An object in free fall seems to be
weightless
What is the acceleration of a child with a mass of 40 kg sitting on a sled with a mass of 10kg. Going down hill with a force of 250 N?
5 m/s2
What is the momentum of a 52 kg bicyclist on 4 kg bicycle moving at a rate of 2 m/s
112 kgm/s
In the absence of air a feather and a brick will
fall at the same rate
This acceleration is caused by a change in direction
centripetal
Gravity causes the path of a projectile be
curved