PHY101 M Exam Questions And Answers With Complete
Solutions
_____ is the rate at which work is done. Correct Answers
Power
A bug splatters on the windshield of a moving car. Which object
experiences the greater force of impact? Correct Answers The
forces are the same
A centripetal force is one that is Correct Answers Directed
towards the center of curvature if the path of a moving object
A falling object is said to reach terminal speed when Correct
Answers Its air resistance equals the force of gravity on it
A freight car moving at 20 m/s to the right strikes a stationary
freight car of the same mass. If the collision is elastic, Correct
Answers The first car will stop, and the second call will move
away at 20 m/s to the right
A hockey puck sliding across the ice toward the goal is a good
illustration of Newton's Correct Answers First law of motion
A man leans over the edge of a cliff and throws a rock upward at
5m/s. Neglecting air resistance, one second later the rock's speed
is Correct Answers 5 m/s
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the mass is then decreased to 0.5 kg,
, the rotational inertia of the new system will be ____ as before.
Correct Answers One half as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the mass is then increase to 2 kg, the
rotational inertia of the new system will be ____ as before.
Correct Answers Twice as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the radius of the circle is then
decreased to 0.5 meters, the rotational inertia of the new system
will be ____ as before. Correct Answers One fourth as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the radius of the circle is then
increase to 2 meters, the rotational inertia of the new system will
be ____ as before. Correct Answers Four times as much
A net force of 8 N on an object will cause a 4 kg object to
accelerate Correct Answers 2 m/s^2
A rifle recoils while firing a bullet. The speed of the rifle's recoil
is small because the Correct Answers Rifle has a significantly
greater mass compared to the bullet
A skydiver steps from a helicopter and falls for a few seconds
until he reaches his terminal velocity. Thereafter, until he opens
his parachute, his acceleration Correct Answers Is zero
Solutions
_____ is the rate at which work is done. Correct Answers
Power
A bug splatters on the windshield of a moving car. Which object
experiences the greater force of impact? Correct Answers The
forces are the same
A centripetal force is one that is Correct Answers Directed
towards the center of curvature if the path of a moving object
A falling object is said to reach terminal speed when Correct
Answers Its air resistance equals the force of gravity on it
A freight car moving at 20 m/s to the right strikes a stationary
freight car of the same mass. If the collision is elastic, Correct
Answers The first car will stop, and the second call will move
away at 20 m/s to the right
A hockey puck sliding across the ice toward the goal is a good
illustration of Newton's Correct Answers First law of motion
A man leans over the edge of a cliff and throws a rock upward at
5m/s. Neglecting air resistance, one second later the rock's speed
is Correct Answers 5 m/s
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the mass is then decreased to 0.5 kg,
, the rotational inertia of the new system will be ____ as before.
Correct Answers One half as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the mass is then increase to 2 kg, the
rotational inertia of the new system will be ____ as before.
Correct Answers Twice as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the radius of the circle is then
decreased to 0.5 meters, the rotational inertia of the new system
will be ____ as before. Correct Answers One fourth as much
A mass of 1 kg is tied to a string and swung in a horizontal
circle of radius 1 meter. If the radius of the circle is then
increase to 2 meters, the rotational inertia of the new system will
be ____ as before. Correct Answers Four times as much
A net force of 8 N on an object will cause a 4 kg object to
accelerate Correct Answers 2 m/s^2
A rifle recoils while firing a bullet. The speed of the rifle's recoil
is small because the Correct Answers Rifle has a significantly
greater mass compared to the bullet
A skydiver steps from a helicopter and falls for a few seconds
until he reaches his terminal velocity. Thereafter, until he opens
his parachute, his acceleration Correct Answers Is zero
