Lesson: Kinematics and ForcesPhysics
In this lesson, we will learn how to analyze the resultant motion of objects that exert various forces and have various forces exerted on them.
Sample Question Videos
Worksheet: 25 Questions • 3 Videos
A constant 10 N horizontal force is applied to a 20 kg cart at rest on a level floor. If friction is negligible, what is the speed of the cart by the time it has been pushed 8.0 m?
A firework of mass 2.50 kg is fired straight up from a mortar and reaches a height of 110 m above the muzzle of the mortar.
Neglecting air resistance, calculate the firework’s velocity when it leaves the mortar.
If the mortar itself is a tube of length 0.450 m, calculate the magnitude of the average acceleration of the firework in the tube as it goes from zero to the velocity at which it leaves the mortar.
What is the magnitude of the average force on the firework in the mortar?
A shot-putter throws a shot of mass 7.26 kg a horizontal distance of 22.2 m.
The shot is released from the shot-putter’s hand 2.20 m vertically above the ground and at an angle above the horizontal. What is the initial speed of the shot?
While in the shot-putter’s hand, the shot is accelerated uniformly over a 1.20 m distance. What net force acted on the shot to accelerate it?