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Chapter 4: 12P (page 78)

An astronaut on a strange planet finds that she can jump a maximum horizontal distance of $15 m$ if her initial speed is $3 m / s$ . What is the free-fall acceleration on the planet?

Short Answer

Expert verified

The free fall acceleration on the planet is $0.6 m / s^{2}$ .

Step by step solution

Given data

Definition of acceleration.

The rate at which an object's velocity changes with respect to time is called acceleration. Accelerations are measured in terms of vectors.

Find the free fall acceleration.

Given data,

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Most popular questions from this chapter

A dive-bomber has a velocity of $280 m/s$ at an angle $θ$ below the horizontal. When the altitude of the aircraft is $2.15 km$ , it releases a bomb, which subsequently hits a target on the ground. The magnitude of the displacement from the point of release of the bomb to the target is $3.25 km$ . Find the angle $θ$ .

The "Vomit Comet." In microgravity astronaut training and equipment testing, NASA flies a $KC 135 A$ aircraft along a parabolic flight path. As shown in Figure, the aircraft climbs from $24000 ft$ to $31000 ft$ , where it enters a parabolic path with a velocity of $143 m / s$ nose high at $45^{\circ}$ and exits with velocity $143 m / s$ at $45^{\circ}$ nose low. During this portion of the flight, the aircraft and objects inside its padded cabin are in free fall; astronauts and equipment float freely as if there were no gravity. What are the aircraft's

(a) speed and

(b) altitude at the top of the maneuver?

Question: -In which of the following situations is the moving object appropriately modeled as a projectile? Choose all correct answers.

(a) A shoe is tossed in an arbitrary direction.

(b) A jet airplane crosses the sky with its engines thrusting the plane forward.

(d) A rocket moves through the sky, at much less than the speed of sound, after its fuel has been used up. (e) A diver throws a stone under water.

Question: -A certain light truck can go around a curve having a radius of with a maximum speed of . To have the same acceleration, at what maximum speed can it go around a curve having a radius of ?

(a) 64 m/s

(b) 45 m/s

(d) 23 m/s

(e) 16 m/s

Why is the following situation impossible? A normally proportioned adult walks briskly along a straight line in the $+ x$ direction, standing straight up and holding his right arm vertical and next to his body so that the arm does not swing. His right hand holds a ball at his side a distance $h$ above the floor. When the ball passes above a point marked as $x = 0$ on the horizontal floor, he opens his fingers to release the ball from rest relative to his hand. The ball strikes the ground for the first time at position $x = 7.00 h$

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An astronaut on a strange planet finds that she can jump a maximum horizontal distance of $15 m$ if her initial speed is $3 m / s$ . What is the free-fall acceleration on the planet?

Short Answer

Step by step solution

Given data

Definition of acceleration.

Find the free fall acceleration.

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Most popular questions from this chapter

Recommended explanations on Physics Textbooks

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An astronaut on a strange planet finds that she can jump a maximum horizontal distance of15mif her initial speed is3m/s. What is the free-fall acceleration on the planet?

Short Answer

Step by step solution

Given data

Definition of acceleration.

Find the free fall acceleration.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Engineering Physics

Magnetism and Electromagnetic Induction

Torque and Rotational Motion

Electricity and Magnetism

Classical Mechanics

Fields in Physics

Study anywhere. Anytime. Across all devices.

An astronaut on a strange planet finds that she can jump a maximum horizontal distance of $15 m$ if her initial speed is $3 m / s$ . What is the free-fall acceleration on the planet?