An object in orbit around Earth
a. is not experiencing gravity. b. is in free fall.
c. is accelerating towards Earth. d. is in free fall and is accelerating toward Earth.
d
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A beam with an overhang is loaded by a uniform load of 3 kN/m over its entire length. Moment of iner- tia Iz 5 3.36 3 106 mm4 and distances to top and bottom of the beam cross section are 20 mm and 66.4 mm, respectively. It is known that reactions at A and B are 4.5 kN and 13.5 kN, respectively. The maximum bending stress in the beam is approximately:
(A) 36 MPa
(B) 67 MPa
(C) 102 MPa
(D) 119 MPa
A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m. The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun. The kinetic energy of the projectile when it is shot from the gun is
A. 0.125 J. B. 0.090 J. C. 0.075 J. D. 0.051 J. E. 0.030 J.
An object that has twice as much mass as another object also has twice as much
A) inertia. B) velocity. C) gravitational acceleration. D) volume. E) all of the above
What is the largest ocean on Earth?
a. Atlantic b. Indian c. Antarctic d. Mediterranean e. Pacific