Newton's Second Law in 1 Dimension: A 450-kg sports car accelerates from rest to 100 km/h in 4.80 s. What magnitude force does a 68.0 kg passenger experience during the acceleration?
A. 394 N
B. 82.0 N
C. 342 N
D. 311 N
Answer: A
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Mass and Weight: The acceleration due to gravity is lower on the Moon than on Earth. Which one of the following statements is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?
A. Mass is less, weight is the same. B. Mass is the same, weight is less. C. Both mass and weight are less. D. Both mass and weight are the same.
Engineers are designing a curved section of a highway. If the radius of curvature of the curve is at what angle should the curve be banked so that a car traveling at 29.0 m/s will stay on the road without the aid of frictional forces?
A) 23.9° B) 16.7° C) 21.0° D) 26.1°
A neutron star is ________
A) the remains of a star that died in a massive star supernova (if no black hole were created) B) a star made mostly of elements with high atomic mass numbers, so that they have lots of neutrons C) the remains of a star that died by expelling its outer layers in a planetary nebula D) an object that will ultimately become a black hole
An electron moves with a speed of 3.0 × 104 m/s perpendicular to a uniform magnetic field of 0.40 T. What is the magnitude of the magnetic force exerted on the electron? (e = 1.60 × 10-19 C)
A) 4.8 × 10-14 N B) 1.9 × 10-15 N C) 5 × 10-20 N D) 2.2 × 10-24 N E) 0 N