Listena bicycle and its rider have a combined mass of 80. kilograms and a speed of 6.0 meters per second. what is the magnitude of the average force needed to bring the bicycle and its rider to a stop in 4.0 seconds?
a.1.2 × 102 n
b.3.2 × 102 n
c.4.8 × 102 n
d.1.9 × 103 n

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?