Projectile Motion: A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A. 6.1 m/s
B. 7.4 m/s
C. 8.1 m/s
D. 8.9 m/s
Answer: C
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Algebraic symbols in physics equations represent physical quantities, therefore
A. the symbols represent numbers only. B. the symbols represent numbers and units. C. the symbols consist of units only. D. the symbols are only abstract. E. the symbols are only imaginary.
A 1000-kg car is slowly picking up speed as it goes around a horizontal curve whose radius is 100 m. The coefficient of static friction between the tires and the road is 0.350. At what speed will the car begin to skid sideways?
A) 9.25 m/s B) 23.6 m/s C) 34.3 m/s D) 35.0 m/s E) 18.5 m/s
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of ?0.40 rad/s2 has an angular velocity of 1.5 rad/s and an angular position of 2.3 rad. What is the angular position of the wheel at t = 2.0 s?
a. 4.9 rad b. 4.7 rad c. 4.5 rad d. 4.3 rad e. 4.1 rad
How many arcseconds are in 1 arcminute?
A) 60 B) 360 C) 3600 D) 100 E) 10,000