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 ?