Peter walks 4 meters East and 3.5 meters North. How far is he from his starting point?
5.3m = c
100
Which has the least inertia?
A) a 20 kg girl running at 2m/s
B) a 70 kg man sitting on a chair
C) a 85 kg man walking at 1m/s
D) a 30 kg woman running at 5m/s
A) a 20 kg girl running at 2m/s
100
An object traveling at 10 m/s has a momentum of 16kgm/s. What is the mass of the object?
m=1.6kg
100
A boy pulls a rope horizontally using 60J in 3 seconds. How much power did he use?
p=20 w
100
What is the force needed to stretch a spring with a constant of 85N/m a length of 0.08m?
Fs= 6.8
200
A runner sprints 200m East and finishes the race in 20 seconds. What is the runner's velocity?
v=10 m/s
200
Find the force required to produce an acceleration of 1.5m/s^2 on a body mass of 50 kg
f= 75N
200
A car travels around a track of radius 300m in 40 seconds. Find the speed of the car
v= 47 m/s
200
A car of mass 1500kg is traveling west at 30m/s when it strikes a cement barrier head on. What is the magnitude of the impulse applied to the car?
J= -45000 kgm/s
200
A man lifts a box that weighs 200N. The box is lifted 0.600m. How much work does the man do?
w= 120J
300
How far does a car travel if it starts at 15 m/s and accelerates at 4.0 m/s^2 until it reaches a speed of 30m/s?
d=84.4m
300
A box with a mass of 20 kg is pushed with a force of 32N. What is the acceleration of the box?
1.6m/s^2=a
300
If a 7.0 kg object moves 10.0m in 4.0s, what is the momentum?
p= 17.5 kgm/s
300
A golf ball is hit with an initial speed of 35 m/s at and angle of 39 degrees above the horizontal. What are the initial horizontal and vertical velocity components?
A 8.0 kg mass hangs from a spring and stretches the spring 7.0m. What is the constant of the spring?
k=11.2N/m
400
Use dimensional analysis to determine the SI units for the circumference of a circle
? = m
400
What is the weight of a 1.5kg box on earth?
Fg= 14.7N
400
A hammer thrower whirls around a 9kg hammer. The distance from the hammer to the thrower is 4 meters. If the thrower can pull in with a force of 1800N, at what speed can he whirl the hammer?
v=28.3 m/s
400
What velocity must a roller coaster travel at through the top of loop with a radius of 30m?
v= 17.1 m/s
400
A cannon is fired directly upward. The cannon ball returns to the ground 8.0 seconds after it is fired. At what speed did the cannon launch the cannon ball?
vi= 39.2m/s
500
A student drops a ball out of a window and falls to the ground. If air resistance is negligible, how long does the ball take to fall 20 meters?
t=2.02s
500
A 1.5 kg cart is accelerated uniformly from rest to a speed of 4.0m/s in 0.7s. what is the magnitude of the force producing this acceleration?
f= 8.57N
500
A man picks up the trail of baseball and finds that it landed 0.50m from the 1.5m high table. At what speed was the ball rolling off the table?
0.91m/s= vi
500
A rocket is launched straight up and reaches a height of 90 meters. How long was the rocket in the air?
Ttotal= 8.56s
500
A pencil rolls horizontally off a 1.5 meter high desk and lands 0.40m from the base of the desk. What was the pencil's horizontal velocity?