Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 13000-kg load sits on the flatbed of a 20000-kg truck moving at 15.0 m/s, Assume the load is not tied down to the truck and has a coefficient of static friction of 0.500 with the truck bed. (a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck. m (b) Is any piece of data unnecessary for the solution? (Select all that apply.) O mass of the load O mass of the truck O velocity O coefficient of static friction O all are necessary
Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 13000-kg load sits on the flatbed of a 20000-kg truck moving at 15.0 m/s, Assume the load is not tied down to the truck and has a coefficient of static friction of 0.500 with the truck bed. (a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck. m (b) Is any piece of data unnecessary for the solution? (Select all that apply.) O mass of the load O mass of the truck O velocity O coefficient of static friction O all are necessary
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Transcribed Image Text:Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking.
Assume, for example, that a 13000-kg load sits on the flatbed of a 20000-kg truck moving at 15.0 m/s. Assume the load is not tied down to the truck and has a coefficient of static friction of 0.500 with the truck bed.
(a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck,
m
(b) Is any piece of data unnecessary for the solution? (Select all that apply.)
O mass of the load
O mass of the truck
O velocity
O coefficient of static friction
D all are necessary
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A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 136 N at an angle of 27.0° above the horizontal. The box has a mass of 21.0 kg, and
the coefficient of kinetic friction between box and floor is 0.300.
(a) Find the acceleration of the box.
m/s?
(b) The student now starts moving the box up a 10.0° incline, keeping her 136 N force directed at 27.0° above the line of the incline. If the coefficient of friction is unchanged, what is the new acceleration of the
box?
m/s, up the incline
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