Dynamics
A car is moving at a constant velocity on a straight road. According to Newton's First Law, what can be said about the net force acting on the car?
The net force is equal to the car's weight.
The net force is in the direction of motion.
The net force is zero.
The net force is opposite to the direction of motion.
Which of the following best describes a closed system?
A system that exchanges both matter and energy with its surroundings.
A system that exchanges energy but not matter with its surroundings.
A system that exchanges matter but not energy with its surroundings.
A system that does not exchange matter or energy with its surroundings.
A spacecraft is drifting in deep space, far from any stars or planets. Which type of system best describes the spacecraft?
Open System
Closed System
Isolated System
Conservative System
What happens to the gravitational force between two objects if the distance between them is doubled?
It is doubled.
It is quadrupled.
It is halved.
It is reduced to one-quarter.
Planet X has a mass twice that of Earth and a radius twice that of Earth. What is the acceleration due to gravity on Planet X, in terms of g (the acceleration due to gravity on Earth)?
0.5g
g
2g
4g
A book is resting on a table. What is the direction of the normal force acting on the book?
Parallel to the surface of the table.
Perpendicular to the surface of the table and pointing upwards.
Perpendicular to the surface of the table and pointing downwards.
At an angle to the surface of the table.
A block with a weight of 50 N is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.3. A horizontal force of 10 N is applied to the block. Will the block move?
Yes, because the applied force is greater than the weight.
Yes, because the applied force is greater than the maximum static friction.
No, because the applied force is less than the weight.
No, because the applied force is less than the maximum static friction.

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An object is placed on an inclined plane. As the angle of the incline is increased, at what point does the block begin to slide?
When the normal force equals the weight of the block.
When the component of weight parallel to the incline equals the maximum force of static friction.
When the angle of the incline reaches 90 degrees.
When the component of weight perpendicular to the incline equals the applied force.
A rocket is accelerating through space. Which of the following statements is true regarding inertial reference frames?
An inertial reference frame is any frame accelerating along with the rocket.
Newton's First Law does not apply in any accelerating frame.
An inertial reference frame is one where the rocket appears to be at rest.
An inertial reference frame is a frame where Newton's First Law holds true, which is not the case inside the accelerating rocket.
A hockey puck slides across frictionless ice with a constant velocity. What is the net force acting on the puck?
Equal to its weight.
In the direction of motion.
Opposite to the direction of motion.
Zero.