You need to log-in or subscribe in order to use Student access.

Problems: Newton's 2nd

1. A thin string is attached to a 5kg mass which is placed on a 1m high table. The string is so thin that it will break with a force of 40N so cannot be used to lift the mass. However if the mass is allowed to accelerate downwards the string can be used to lower the mass to the ground without breaking. Calculate the minimum speed that the mass will reach the ground if lowered in this way.2. Two masses hang from a pulley...

To access the entire contents of this site, you need to log in or subscribe to it.

Alternatively, you can request a one month free trial.