Lesson: Normal Reaction ForcePhysics
In this lesson, we will learn how to calculate the forces exerted by surfaces in reaction to forces applied to them, such as on objects on inclined slopes.
Sample Question Videos
A roller coaster car starts to move from rest at the top of a track that is 30.0 m long and inclined at an angle below the horizontal. Assume that friction is negligible.
What is the magnitude of the acceleration of the car?
How much time passes before the car reaches the bottom of the track?
A block of mass 2.0 kg is on a perfectly smooth ramp that makes an angle of below the horizontal.
What is the magnitude of the block’s acceleration down the ramp?
What is the magnitude of the force of the ramp on the block?
What magnitude force applied upward along and parallel to the ramp would allow the block to move with constant velocity?
A 120 kg astronaut is riding in a rocket sled that is sliding along an inclined plane. The sled has a horizontal component of acceleration of 5.0 m/s2 and a downward component of 3.8 m/s2. Calculate the magnitude of the force on the rider by the sled. Remember that gravitational acceleration must be considered.