Chapter 5 A Martian lander is approaching the
- Slides: 14
Chapter 5
A Martian lander is approaching the surface. It is slowing its descent by firing its rocket motor. Which is the correct free-body diagram for the lander? (1) (2) (3) (4) (5)
A Martian lander is approaching the surface. It is slowing its descent by firing its rocket motor. Which is the correct free-body diagram for the lander? (1) (2) (3) (4) (5)
An elevator that has descended from the 50 th floor is coming to a halt at the 1 st floor. As it does, your apparent weight is 1. More than your true weight. 2. Less than your true weight. 3. Equal to your true weight. 4. Zero.
An elevator that has descended from the 50 th floor is coming to a halt at the 1 st floor. As it does, your apparent weight is 1. More than your true weight. 2. Less than your true weight. 3. Equal to your true weight. 4. Zero.
Rank order, from largest to smallest, the size of the friction forces to in these 5 different situations. The box and the floor are made of the same materials in all situations. 1. fc > 2. fb > 3. fa > 4. fa = 5. fb > fd > fc = fb > fc = fe > fd = fc = fd = f b > f a. f e > f a. fe > fb. f d = f e > f a.
Rank order, from largest to smallest, the size of the friction forces to in these 5 different situations. The box and the floor are made of the same materials in all situations. 1. fc > 2. fb > 3. fa > 4. fa = 5. fb > fd > fc = fb > fc = f e > f b > f a. f d > f e > f a. fd = fe > fb. f c = f d = f e. fd = fe > fa.
The terminal speed of a Styrofoam ball is 15 m/s. Suppose a Styrofoam ball is shot straight down with an initial speed of 30 m/s. Which velocity graph is correct? (1) (2) (4) (3) (5)
The terminal speed of a Styrofoam ball is 15 m/s. Suppose a Styrofoam ball is shot straight down with an initial speed of 30 m/s. Which velocity graph is correct? (1) (2) (4) (3) (5)
Chapter 5 Reading Quiz
The coefficient of static friction is 1. smaller than the coefficient of kinetic friction. 2. equal to the coefficient of kinetic friction. 3. larger than the coefficient of kinetic friction. 4. not discussed in this chapter.
The coefficient of static friction is 1. smaller than the coefficient of kinetic friction. 2. equal to the coefficient of kinetic friction. 3. larger than the coefficient of kinetic friction. 4. not discussed in this chapter.
The force of friction is described by 1. the law of friction. 2. theory of friction. 3. a model of friction. 4. the friction hypothesis.
The force of friction is described by 1. the law of friction. 2. theory of friction. 3. a model of friction. 4. the friction hypothesis.
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