82. To maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the road (the rolling resistance). (a) What are the drag forces at 70 km/h and 100 km/h for a Toyota Camry? (Drag area is 0.70 m²) (b) What is the drag force at 70 km/ h and 100 km/h for a Hummer H2? (Drag area is 2.44 m2) Assume all values are accurate to three significant digits.

82. To maintain a constant speed, the force provided by a car's engine must equal the drag force plus the force of friction of the road (the rolling resistance). (a) What are the drag forces at 70 km/h and 100 km/h for a Toyota Camry? (Drag area is 0.70 m²) (b) What is the drag force at 70 km/ h and 100 km/h for a Hummer H2? (Drag area is 2.44 m2) Assume all values are accurate to three significant digits.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 62P: Consider Figure 5.28. The driver attempts to get the car out of the mud by exerting a perpendicular...

See similar textbooks

Similar questions

Calculate the maximum acceleration of a car that is heading up a 4.00slope (one that makes an angle of 4.00with the horizontal) under the following road conditions. Assume that only half the weight of the car is supported by the two drive wheels and that the coefficient of static friction is involved—that is, the tires are not allowed to slip during the acceleration. (Ignore rolling.) (a) On wet concrete. (b) On wet concrete. (C) On ice, assuming that s=0.100 , the same as for shoes on ice.
As shown below, the coefficient of kinetic friction between the surface and the larger block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.30. lf F=10Nand M=1.0kg , what is the tension in the connecting string?
A physics major is cooking breakfast en she notices that the frictional force between her steel spatula and Teflon trying pan is only 0.200 N. Knowing the coefficient of kinetic friction between the two materials, she quickly calculates the normal force. What is it?
While moving into your new place, you have to push a 25-kg box across the foor. You push on it with someforce at angle of 27◦ below your shoulder, as shown in the fgure. Assuming the coefcient of static frictionbetween the box and foor is 0.60, with what force do you need to push to just get the box moving? (Hint: itis safe to assume that the acceleration of the box is still zero at the instant it starts moving.)
Tim pushes a 195kg lawnmower with a force of 850N at an angle of 35 degrees with respect to the horizontal. If it accelerates along the level grou D at 2.90 m/s2, what is the coefficient of Kinetic Friction between the mower and the ground.
is it possible to consider the drag force and thurst force on a moving vehicle to be in the same direction?
When a parachustist jumps out of an airplane when are the veritcal drag forces maximum?
An igneous rock has a mass of 5 Kg. What is its weight on the moon, where the acceleration due to gravity is one sixth that on Earth? What is ist weight in Jupiter, where the acceleration due to gravity is 2.64 times that on Earth?
Recently, the Amazon and Virgin groups launched commercial space flights. These flights do not store fuel on board, instead, they inhale oxygen from the air. If the weight of one of these new rockets is 2420 kN, while a regular rocket is 19579 kN, what would be the acceleration of these two rockets close to the Earth's surface when a thrust of 25467 kN is applied?
In the pulley system illustrated, the coefficient of friction between the block and table is 0.555. Whatis the magnitude of acceleration experienced by the masses?
A rubber block with a mass of 10 kg is on a surface that has a coefficient of static friction (µs) of 0.8. What is the minimum force needed to get it moving? If the surface is inclined to an angle of 30º, will the block slip?
In a television commercial, a small, spherical bead of mass 4.00 g is released from rest at t=0in a bottle of liquid shampoo. The terminal speed is observed to be 2.00 cm/s. Find (a) the value of the constant bin the equation v=mgb(1ebt/m), and (b) the value of the resistive force when the bead reaches terminal speed.