Kinematics

Which of the following best describes a reference frame?

A car is traveling at 25 m/s east. Relative to the car, a person walks towards the back of the car at 1 m/s. What is the person's velocity relative to an observer standing on the side of the road?

A boat is traveling north at 8 m/s in a river that flows east at 6 m/s. What is the magnitude of the boat's velocity relative to the riverbank?

A plane flies with a velocity of 200 m/s East relative to the air. There is a crosswind blowing from the South at 50 m/s. A car is traveling on the ground, directly below the plane, at 30 m/s East. What is the velocity of the plane relative to the car?

An object has an acceleration of 4 m/s² to the right in an inertial reference frame. What is its acceleration in another inertial reference frame moving at a constant velocity relative to the first?

A projectile is launched from a cart moving horizontally at a constant velocity. If the projectile's acceleration is measured to be 9.8 m/s² downward relative to the cart, what is the projectile's acceleration as observed from the ground (assuming the ground is an inertial reference frame)?

Two objects, A and B, are moving with different accelerations. Object A has an acceleration of 2 m/s² to the right relative to the ground. An observer in a car moving at a constant velocity relative to the ground observes object B to have an acceleration of 3 m/s² to the left. After 5 seconds, what is the relative disp...

A ball is thrown forward with a velocity of 15 m/s inside a train moving at a constant velocity of 25 m/s. Calculate the velocity of the ball with respect to a stationary observer outside the train.

Car A and Car B are moving on a road. Car A is moving at 20 m/s and Car B is moving at 30 m/s in the same direction. A person is walking inside Car B towards the front of the car at a speed of 2 m/s. Calculate the velocity of the person with respect to an observer in Car A.

Which of the following best describes a reference frame in physics?