The natural tendency of an object to remain at rest or in uniform straight-line motion is called ______________
Fill in the blank(s) with correct word
inertia
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A satellite is orbiting Earth in a circular orbit of radius r when it fires its rockets and acquires speed rapidly. Following this, the satellite's orbit
A) becomes hyperbolic. B) stays circular but with a larger radius. C) stays circular but with a smaller radius. D) becomes elliptical. E) none of the above
A firecracker explodes in midair and breaks up into many fragments. Which of the following statements are true regarding conditions immediately before and immediately after the explosion:
I. The total momentum of the fragments is equal to the original momentum of the firecracker. II. The total kinetic energy of the fragments is equal to the original kinetic energy of the firecracker. A) Statement I only B) Statement II only C) Both Statement I and Statement II D) Neither statement is true.
All nuclei of a given element have the same number of
A) neutrons. B) protons. C) nucleons. D) protons + neutrons.
A car travels around an unbanked highway curve (radius 0.15 km) at a constant speed of 25 m/s. What is the magnitude of the resultant force acting on the driver, who weighs 0.80 kN?
a. 0.87 kN b. 0.34 kN c. 0.80 kN d. 0.00 kN e. 0.67 kN