AP Physics 1

Georgia presses a book against a wall to keep it stationary. (The wall is perpendicular to the ground). Which of the forces below is the 3rd law reaction force to the gravitational force on the book

The pull of the book on the Earth

Which word description below best matches the mathematical description below, x:0-0.80N = (1000 kg)a_x, y:N - (1000Kg(9.8 m/s²) = (1000kg)0, 0 - 16 m/s = a_xt

The 0.80N force of the Earth on the object causes its speed in the x direction to increase from 0 to 16 m/s

Bob has a mass of 80 kg and pushes David of mass 50 kg. Bob pushes with a force 100N on David while standing on a frictionless surface. The magnitude of acceleration of Bob is

1.25 m/s²

August requires a constant 200 N to push a sled with Phyzzkid as an occupant across the snow at constant velocity when he pushes the back of the sled at a downward angle of 30 to the horizontal. If instead August uses a rope to pull the front of the sled (with Phyzzkid still as an occupant) at an upward angle of 30 to the horizontal, how much force will it require to more the sled at constant velocity?

Less then 200N

An increasing horizontal force is applied on a block while it remains stationary. As the applied force increases, which of the following is true of the normal force and frictional force on the block?

Remains Constant(NF) - Increases(FF)

To analyze the characteristics and performance of the brakes on a 1500 kg car, researchers collected the data shown in the table above. It shows the car’s speed when the brakes are first applied and the corresponding brakes distance required to stop the car. The magnitude of the avg braking force on the car is most nearly 

12,000 N

Three objects can only move along a straight, level path. The graphs below show the position of d of each of the objects plotted as a function of time t. The sum of the forces on the object is zero in which of the cases?

I and II only