An object has a mass of 12 kg on Earth. If this object is transported to the Moon, where the gravitational field strength is approximately 1.6 N/kg, what is its weight?
A car of mass 1200 kg is moving at 20 m/s when the driver applies the brakes, producing a constant retarding force of 6000 N. How long does it take for the car to come to rest?
A train consists of an engine of mass 5000 kg pulling two cars of masses 2000 kg and 3000 kg in a straight line on a horizontal track. The train accelerates at 2 m/s². What is the tension in the coupling between the two cars behind the engine?
Which of the following is a contact force?
An elevator of mass 800 kg is connected over a frictionless pulley to a counterweight of mass 600 kg. The system is released from rest. Taking g = 10 m/s², what is the tension in the cable?
What is meant by inertia?