Kinematics
Dynamics
Energy & Work
Momentum & Impulse
Rotation
100
Starting from rest, an object accelerates on a straight level surface at a rate of 2 m/s2 for 10 seconds. What is the speed of the object at the end of 10 seconds?
100
What is the magnitude of the force of gravity on a 10kg object?
100 N
100
Without looking at your equation sheet, the equation for kinetic energy is...
K=1/2mv2
100
Fill in the blank:
100
Most hurricanes in the northern hemisphere rotate counterclockwise, as seen from a satellite view. IN what direction does the angular velocity vector of one of these hurricanes point?
Out into space, perpendicular to the Earth's surface
200
A ball is dropped from a height h. A second ball is thrown vertically upward from the ground with an initial velocity v0. Derive an expression for the time t that the balls pass each other.
200
What is the magnitude of the normal force on a 250 g whiteboard marker at rest on the table?
2.5 N
200
What type of energy is associated with the relative positions of objects in a system?
potential energy
200
The impulse-momentum theorem is equivalent to which of Newton's Laws?
N2L
200
A merry-go-round is accelerated uniformly from rest to an angular velocity of 5 rad/s in a period of 10s. How many times does the merry-go-round make a complete revolution in this time?
4 complete revolutions
300
An object starts from rest at t=0s. The velocity v(t) is given by v=2t+3t2. How far does the object travel in the first 5 seconds?
300
What is the coefficient of friction between a rough surface at a 45 degree incline and a 4 kg book?
mu = 1
300
When is the total mechanical energy of a system conserved? I. Always II. When nonconservative forces are present but do not do work. III. When nonconservative forces are not present.
II. and III.
300
On what does the direction of an object's momentum depend?
The direction of its velocity
300
A car, starting from rest, accelerates for 5 seconds until its wheels are moving with an angular velocity of 1000 rad/s. What is the angular acceleration of the wheels during this 5 seconds?
400
An object moving in a straight line has a velocity v in m/s that varies with time t in seconds, according to the following function: v=8t+2.5t3 What is the instantaneous acceleration at t=2s?
400
Consider a 5 kg object at rest on a 30 degree incline. What is the normal force of the ramp on the object?
25 N
400
A 2 kg mass is moving in one dimension with a velocity given by v(t)=1/2t2. At t=4s, the instantaneous power delivered by the net force is...
P = 64 watts
400
In what circumstances is momentum not conserved?
When a net external force acts on a system
400
An object movies in a circle of radius 2 m with an instantaneous angular velocity of 5 rad/s and an angular acceleration of 4 rad/s2. What's the magnitude of the linear acceleration of the object?
50.6 m/s/s
500
The acceleration of a moving object is a=9t2. The object has an initial position of -2 m and is travelling with a velocity of 3 m/s in the negative x direction. At what time is the acceleration of the object 38 m/s/s?
500
The equation for the velocity of a 2kg particle as a function of time is v(t)=30t3 + 10. Derive an expression for the net force on the particle as a function of time.
F(t)=360t2
500
A 10 kg mass is moving at 5 m/s over a rough surface. A 50 N horizontal tension force causes it to accelerate to 8 m/s while travelling 6 m. The coefficient of kinetic friction between the mass and the surface is...
= 0.18
500
In a particular crash test, an automobile of mass 1500 kg collides with a wall. The initial and final velocities of the automobile are vi=-15.0 m/s and vf = 2.6 m/s (both in the i-hat direction). If the collision lasts for 0.150 s, find the impulse on the automobile due to the collision and the average force exerted on the automobile.
J=2.6x104 kg*m/s F=1.76x105 N in the i-hat direction
500
What is the mass of a disk of radius 10 m which requires 15 Nm of torque to change its rotational velocity by 20 rad/s in 30 s?
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