Kinematics
What does UAM stand for (exactly)?
Uniformly Accelerated Motion
The horizontal acceleration of a projectile is always ____.
zero
A child is on a playground swing, motionless at the highest point of his arc. What energy transformation takes place as he swings back down to the lowest point of his motion?
gravitational potential energy to kinetic energy or U to KE.
What is the momentum equation?
p=mv
One revolution is the same as __ rad.
2π
Fill in the blank: d=__(t).
v
A stone thrown from the top of a tall building follows a path that is this shape.
parabolic
Two trailers, X with mass 500 kg and Y with mass 2000 kg, are being pulled at the same speed. The ratio of the kinetic energy of Y to that of X is __.
4:1
The names of the three types of collisions are ___, ____, and ______.
perfectly elastic, inelastic, and perfectly inelastic
One revolution per minute is about how many rad/s?
0.105 rad/s
What is the acceleration of gravity on Earth rounded to the nearest thousandth?
9.807 m/s^2
Two projectiles of different mass are thrown in the air. Which one has a greater vertical acceleration?
They have the same acceleration.
On a graph of the force vs compression of a spring, what aspect of the graph represents the work performed on the spring?
the area
A 2.5-kg stone is released from rest and falls toward Earth. After 4.0 s, the magnitude of its momentum is __.
98 kg⋅m/s
A net torque applied to a rigid object always tends to produce _____.
angular acceleration
A car accelerates at 2 m/s^2. Assuming the car starts from rest, how much time does it need to accelerate to a velocity of 20 m/s?
10 seconds
A dart is thrown horizontally toward a point X on a dart board at 20m/s. It hits point Y, which is below X, 0.1 s later. The distance XY is ___.
0.05 m
A 5.0-kg cart is moving horizontally at 6.0m/s. In order to change its speed to 10.0m/s, the net work done on the cart must be ___. HINT: The net work done on a body is the change of its kinetic energy.
160 J
A 4.0-N puck is traveling at 3.0m/s. It strikes a 8.0-N puck, which is stationary. The two pucks stick together. Their common final speed is __.
1 m/s
Ten seconds after an electric fan is turned on, the fan rotates at 300 rev/min. Its average angular acceleration is __.
3.14 rad/s^2
Michael runs up a hill that is 30 m long at an elevation of 30° above the horizontal. What is his vertical displacement?
15 m
A projectile is fired from ground level over level ground with an initial velocity that has a vertical component of 20m/s and a horizontal component of 30m/s. Using g = 10m/s, the distance from launching to landing points is ___.
120 m
A spring-loaded gun shoots a plastic ball with a launch speed of 2.0 m/s. If the spring is compressed twice as far, the ball's launch speed will be ___.
4 m/s
A 64-kg woman stands on frictionless level ice with a 0.10-kg stone at her feet. She kicks the stone with her foot so that she acquires a velocity of 0.0017m/s in the forward direction. The velocity and direction acquired by the stone is ___.
1.1 m/s backwards
The rotational inertia of a disk about its axis is 0.70 kg⋅m^2. When a 2.0 kg weight is added to its rim, 0.40 m from the axis, the rotational inertia becomes ___.
1 kg⋅m^2