Forces, friction, boxes & buckets.
What to expect.
What happens to a box when you push it? What is the tension on a rope that pulls up some buckets. These questions and many more are answered here.
Find the force and accel
A block of mass 3.75 kg is pushed along a table with a force 45 N. The coeff of friction is .65. Find the friction and acceleration.
2 net-force examples
Find the net force needed for a car (with friction) to maintain a constant velocity, and for one experiencing an acceleration.
The Crumple Zone!
What difference does it make if there is a soft bumper (crumple zone) to absorb the impact during an accident? .
The Little Engine that could!
A brave little train engine pulls 3 cars each filled with heavy ore. What is the tension between each of the train cars?
The Physics of Buckets
Two paint buckets are tied in series and being pulled upward at a constant velocity. Find the tension in each rope. Now, what if they are being accelerated upward instead?
Newton's Mystery!
If you push a box ... that is then pushing another box ... and there is friction, what is the force between the boxes?
A superhero question!
Two heroes want to move a box at a constant velocity. One pushes at 30 degree and one pulls at 30 degrees. Which is better? This is a challenge question.
A Fancy Drew Mystery!
Fancy is called in to solve a car mystery. The driver says he did not lock his brakes. But what does the evidence show? Fancy needs to find the coefficient of friction.
A sled question
Some friends pull a sled over snow. Then it hits gravel. What happens? Find the new acceleration.
Spidee and friction
What coefficient of friction does Spidee need to hold a book against the wall ?