Combine the use of Fnet = m•a with kinematic equations to solve for an unknown. All problems include some degree of scaffolding.
Down at the construction site on the corner of Lake and Waukegan, Ben Laborin uses a rope and a counterweight to accelerate a 3.22-kg bucket of tools upward from an initial rest position to the 4th floor. The tension in the rope is 38.8 Newton. Determine …
… the weight of the bucket.
Weight
N
… the net force experienced by the bucket.
Net Force
… the acceleration of the bucket.
Acceleration
m/s/s
… the speed of the bucket after 6.27 seconds.
Speed
m/s
A 340-kg bobsled moving with a speed of 25.9 m/s departs from the main track and moves onto a horizontal section lightly sprinkled with sawdust. The bobsled comes to a stop in a distance of 102 meters. Calculate the …
… acceleration rate of the bobsled. (Magnitude only; no + or - sign.)
… the force of friction experienced by the bobsled.
Friction Force
… the weight of the bobsled.
… the coefficient of kinetic friction between the runners of the sled and the sawdust-covered surface.
Coefficient of Friction
(no unit)
Chuck Wagon applies a horizontal force of 559 N to accelerate a 46.4-kg crate from a rest position. The coefficient of friction between the crate and the floor is 0.812. Determine the ...
… force of friction acting upon the crate.
… the net force experienced by the crate.
… the acceleration of the crate.
… the velocity of the crate after 1.49 seconds.
Velocity
Claire deAisles is pushing a loaded cart down an aisle at the Hy-Vee Grocery Mart using a horizontal force of 33.8 N. The cart (and groceries) has a mass of 39.8 kg and is pushed for 2.61 seconds, starting from rest. Determine …
… the acceleration of the cart.
… the distance the cart will move during these 2.61 seconds.
Distance
m
Claire deAisles is pushing a loaded cart down an aisle at the Hy-Vee Grocery Mart using a horizontal force of 32.1 N. In an effort to free up a hand, she places her 17.6-kg toddler in the cart, adding to the 39.4 kg of cart and grocery mass. Starting from rest, she exerts this 32.1 N force for 2.67 seconds? Determine …
… the distance the cart will move during these 2.67 seconds.
Gina and Riley are at Bluebird Park practicing their hockey on the frozen lake. Riley accelerates the puck to a speed of 11.5 m/s. On its 3.18-second journey towards Gina, it slows to a speed of 5.0 m/s. Determine the …
… magnitude of the acceleration rate of the puck. (Enter a + value.)
… the coefficient of friction between the puck and the ice.
… the distance the puck glides during the 3.18 seconds of motion.