Question

A cart for hauling ore out of a gold mine has a mass of 411 kg, including its load. The cart runs along a straight stretch of track that climbs a shallow 4.45∘ incline. A donkey, which is trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 393 N force for a distance of 127 m by means of a rope that is parallel to the slope but makes an angle of 13.3∘ with the track.

Model the rolling resistance of the cart as though it were sliding on the track with a coefficient of friction of 0.0173. Use ?=9.81 m/s^2, and note that angle A in the image is the angle of the incline while angle B is the angle the rope makes with the track.

Find the work W_{d} that the donkey performs on the cart
during this process.

Find the work ?_{g} that the force of gravity performs
on the cart during this process.

Calculate the work ?_{f} done on the cart by friction
during this process.

Answer #1

a) Shrek finds donkey in a cart (total mass 50 kg) on the side
of the road. He starts to pull the cart along a smooth road with a
coefficient of friction 0.2 with a force of 120 N [FWD]. If he
accelerated to a speed of 15 km/h, how far did the cart move during
acceleration?
b) This is a multiple motion question. Shrek maintains a
constant speed after his initial acceleration, then breaks into a
sprint. He at...

Shrek finds donkey in a cart (total mass 50 kg) on the side of
the road. He starts to pull the cart along a smooth road with a
coefficient of friction 0.2 with a force of 120 N [FWD]. If he
accelerated to a speed of 15 km/h, how far did the cart move during
acceleration?
Continued from Question 1 - so hey guess what? This is a
multiple motion question. Shrek maintains a constant speed after
his initial acceleration,...

ch 6
1:
It is generally a good idea to gain an understanding of the
"size" of units. Consider the objects and calculate the kinetic
energy of each one.
A ladybug weighing 37.3 mg
flies by your head at 3.83 km/h
.
×10
J
A 7.15 kg
bowling ball slides (not rolls) down an alley at 17.5 km/h
.
J
A car weighing 1260 kg
moves at a speed of 49.5 km/h.
5:
The graph shows the ?-directed force
??...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 seconds ago

asked 4 minutes ago

asked 12 minutes ago

asked 12 minutes ago

asked 13 minutes ago

asked 18 minutes ago

asked 18 minutes ago

asked 19 minutes ago

asked 19 minutes ago

asked 23 minutes ago

asked 24 minutes ago

asked 30 minutes ago