Forces and Projectiles Unit Review AP

Front

What is the coefficient of kinetic friction (μ_k)?

Back

The coefficient of kinetic friction (μ_k) is a dimensionless scalar value that represents the ratio of the force of kinetic friction between two bodies to the normal force pressing them together.

Front

What is the coefficient of static friction (μ_s)?

Back

The coefficient of static friction (μ_s) is a dimensionless scalar value that represents the ratio of the maximum static friction force that must be overcome to start moving an object to the normal force acting on the object.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion, meaning it will remain at rest or in uniform motion unless acted upon by an external force.

Front

How do you calculate the distance fallen by an object in free fall?

Back

The distance (d) fallen by an object in free fall can be calculated using the formula: d = 0.5 * g * t², where g is the acceleration due to gravity (approximately 9.8 m/s²) and t is the time in seconds.

Front

What is the maximum height of a projectile?

Back

The maximum height of a projectile can be calculated using the formula: h = (v_i² * sin²(θ)) / (2 * g), where v_i is the initial velocity, θ is the launch angle, and g is the acceleration due to gravity.

Front

What is the effect of launch angle on projectile motion?

Back

The launch angle affects the range and maximum height of a projectile. A launch angle of 45 degrees typically provides the maximum range for a given initial velocity.

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion. Unbalanced forces result in a change in motion, causing acceleration.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time.

Front

What is the role of gravity in projectile motion?

Back

Gravity acts as a constant downward force on a projectile, affecting its vertical motion and causing it to follow a parabolic trajectory.

Front

What is the significance of the area under a velocity-time graph?

Back

The area under a velocity-time graph represents the displacement of the object over the time interval.