College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
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Chapter 5, Problem 14PE
Calculate the maximum acceleration of a car that is heading up a 4° slope (one that makes an angle of 4° with 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 dry concrete. (b) On wet concrete. (c) On ice, assuming that
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Chapter 5 Solutions
College Physics
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- Assuming an unbanked curve, find the minimum static coefficient of friction, between the tires and the road, static friction being the reason that keeps the car from slippingarrow_forwardThe 1.5-Mg four-wheel-drive Jeep is used to push two identical crates, each having a mass of 500 kg. If the coefficient of static friction between the tired and the gournd is us=0,6 , determine the maximum possible speed the Jeep can achieve on 5 s without causing the tired to slip. The coefficient of kinetic friction between the crates and the ground is UK=0.3arrow_forwardSuppose that the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in the previous part. What should be the maximum speed of the car so it can round the curve safely?arrow_forward
- A 5.50kg block starts from rest and slides on a 30°wedge, which issupported by a horizontal surface. The weight of the wedge is 13.70kg. If weneglect the effect of friction, determine: the acceleration of the wedge; the acceleration of the block in relation to the wedge?arrow_forwardA man drags a package across the floor with a force of 40 N, as shown. The mass of the package is 10 kg. If the acceleration of the package across the floor is 3.5 m/s^2, and friction can be neglected, at what angle to the horizontal does the man pull?arrow_forwardA woman pulls a sled which, together with its load, has a mass of m kg. Let g be the acceleration due to gravity. If her arm makes an angle of theta with her body (assumed vertical) and the coefficient of friction (a positive constant) is mu, the least force, F, she must exert to move the sled is given byarrow_forward
- is it possible to consider the drag force and thurst force on a moving vehicle to be in the same direction?arrow_forwardIf the strength of the frictional force is equal to the applied force and oppositely directed, and assuming that all other forces may be ignored, the object must be at rest or ____________________.arrow_forwardCalculate 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.arrow_forward
- Check Your Understanding How does your weight at the top of a tall building compare with that on the first floor? Do you think engineers need to take into account the change in the value of g when designing structural support for a very tall building?arrow_forwardShow that, as stated in the text, a force F exerted on a flexible medium at its center and perpendicular to its length (such as on the tightrope wire in Figure 4.17) gives rise to a tension of magnitude T=F2sin() .arrow_forwardWe know from studying friction forces that static friction increases with increasing normal force between the surfaces, which becomes important for vehicles traveling on icy or snowy roads that have coefficients of static friction much smaller than those of dry pavement. In particular, the greater the normal force on the drive wheels (those coupled to the engine), the better the traction. The horizontal position of the center of mass of a typical compact automobile is located 1.1 m toward the rear as measured from the front wheel axle. The wheelbase (distance from the front wheel axle to the rear wheel axle) is 2.7 m. Assume the car is stationary on level ground and has a weight of 12,000 N. Determine the total normal force on the two front tires and on the two rear tires. Which do you suppose are the drive wheels in this case?arrow_forward
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