Physics Β· Unit 2 Β· Linear motion and force Β· Linear motion
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A warehouse worker applies a horizontal force to move two crates across a concrete floor. Crate A (mass 25 kg) is pushed directly, and Crate B (mass 18 kg) is in contact with Crate A so both move together. The applied force is 215 N and the coefficient of kinetic friction between each crate and the floor is 0.35. Justify whether the contact force between the two crates is greater than, less than, or equal to half the applied force.
A 1,200 kg car accelerates uniformly from rest to 18 m sβ»ΒΉ in 6.0 s on a horizontal road. Identify the net force acting on the car during this acceleration.
A crate of mass 18 kg is being pushed across a horizontal floor by a constant horizontal force of 120 N. A friction force of 48 N opposes the motion. What is the acceleration of the crate?
Compare the net force acting on the trolley during the two phases of motion shown in the table.