Grandfather clocks are designed so they can be adjusted by moving the weight at the bottom of the pendulum up or down. Suppose you have a grandfather clock at home that runs slow
Which of the following adjustments of the weight would make it more accurate? (There could be more than one correct choice.) A) Raise the weight.
B) Lower the weight.
C) Add more mass to the weight.
D) Remove some mass from the weight.
E) Increase the amplitude of swing by a small amount.
A
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The graph shows the force on an object as it moves a distance x. What is the work done by the force when the object moves from 0.0 m to 4.0 m?
A. 6.0 J
B. 8.0 J
C. 10 J
D. 12 J
E. 14 J
A cart is moving with a constant horizontal velocity of 5.00 m/s
A small pebble is launched from the front of the cart with a velocity of 8.00 m/s at 60.0° above the horizontal as measured relative to the cart (see figure) and experiences no significant air resistance. Just as the pebble returns to the level from which it was launched, its distance from the front of the cart is closest to A) 2.83 m. B) 4.60 m. C) 5.66 m. D) 9.19 m. E) 11.3 m.
An electron, initially moving at 2.0 × 104 m/s along the +x-axis, experiences a constant acceleration of 1010 m/s2 in the +y direction. How far from its starting point is the electron after 4.0 × 10-6 seconds?
A) 8.0 m B) 11.3 m C) 9.8 m D) 11.3 cm E) 8.0 cm
The major source of NOx pollution is
a. combustion for electrical generation. b. industry. c. transportation. d. domestic heating.