Question

(a) A constant 20 N force pushes a small ball in the direction
of the force over a distance of 5.0 m. What is the work done by the
force?

(b) A toy cart is pulled a distance of 6.0 m in a straight line
across the floor. The force pulling the cart has a magnitude of 20
N and is directed at 37° above the horizontal. What is the work
done by this force?

(c) A sled plus passenger with total mass 50 kg is pulled 20 m
across the snow (μk = 0.20) at constant velocity by a force
directed 25° above the horizontal. Calculate the work of the
applied force, the work of friction, and the total work.

Answer #1

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A sled plus passenger with total mass 45 kg is pulled 17 m
across the snow (μk = 0.20) at constant
velocity by a force directed 29° above the horizontal.
Calculate the work (in J) of friction.
Calculate the total work (in J).

1.)
Steve pushes a crate 20 m across a level floor at a constant speed
with a force of 200 N. The velocity of the crate is in the
direction of the force Steve is applying to the crate. How much
work is done by Steve?
2.) Steve pushes a crate 20 m across a level floor at a
constant speed with a force of 200 N. The velocity of the crate is
in the direction of the force Steve...

Suppose a sled passenger with total mass 57 kg is pushed 26 m
across the snow (μk = 0.20) at constant velocity by a force
directed 39° below the horizontal. (a) Calculate the work of the
applied force (in J). Incorrect: Your answer is incorrect. J (b)
Calculate the work of friction (in J). Incorrect: Your answer is
incorrect. J (c) Calculate the total work (in J).

A shopper in a supermarket pushes a cart with a force of 40 N
directed at an angle of 25° below the horizontal. The force is just
sufficient to overcome various frictional forces, so the cart moves
at constant speed.
(a) Find the work done by the shopper as she moves down a 35.0-m
length aisle. ____ Joules
(b) What is the net work done on the cart? ____
Joules
Why?
(c) The shopper goes down the next aisle, pushing...

A person pushes a 16.0-kg shopping cart at a constant velocity
for a distance of 16.0 m. She pushes in a direction 21.0° below the
horizontal. A 46.0-N frictional force opposes the motion of the
cart.
(a) What is the magnitude of the force that the shopper
exerts?
____N
(b) Determine the work done by the pushing force.
____ J
(c) Determine the work done by the frictional force.
____ J
(d) Determine the work done by the gravitational force....

A person pushes a 20.3-kg shopping cart at a constant velocity
for a distance of 36.2 m on a flat horizontal surface. She pushes
in a direction 25.1 ° below the horizontal. A 44.5-N frictional
force opposes the motion of the cart. (a) What is
the magnitude of the force that the shopper exerts? Determine the
work done by (b) the pushing force,
(c) the frictional force, and (d)
the gravitational force.

A person pushes a 24.6-kg shopping cart at a constant velocity
for a distance of 21.1 m on a flat horizontal surface. She pushes
in a direction 33.6 ° below the horizontal. A 32.4-N frictional
force opposes the motion of the cart. (a) What is the magnitude of
the force that the shopper exerts? Determine the work done by (b)
the pushing force, (c) the frictional force, and (d) the
gravitational force.

A person pushes a 11.2-kg shopping cart at a constant velocity
for a distance of 15.9 m on a flat horizontal surface. She pushes
in a direction 30.5 ° below the horizontal. A 31.2-N frictional
force opposes the motion of the cart. (a) What is the magnitude of
the force that the shopper exerts? Determine the work done by (b)
the pushing force, (c) the frictional force, and (d) the
gravitational force.

A horizontal force of magnitude 32.5 N pushes a block of mass
4.05 kg a distance of 3.00 m across a floor, where the coefficient
of kinetic friction is 0.600.
(a) How much work is done by that applied force on the
block-floor system?
(b) During that displacement, the thermal energy of the block
increases by 36.0 J. What is the increase in thermal energy of the
floor?
(c) What is the increase in the kinetic energy of the block?

A box with mass 1.74 kg is being pulled across a rough surface
at a constant speed with a coefficient of kinetic friction
µk = 0.366. The pulling force has a magnitude of 11.2 N
and is directed at an angle 32.8 degrees above horizontal. If the
box is dragged a distance of 10.3 m, what is the total energy lost
to friction? (Hint: be sure to account for the upward component of
the pulling force, and note that the...

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