Consider a child who is swinging. As she reaches the lowest point in her swing:
a. the tension in the rope is equal to her weight.
b. the tension in the rope is equal to her mass times her acceleration.
c. her acceleration is downward at 9.8 m/s2.
d. none of the above.
Question 2
A roller coaster, loaded with passengers, has a mass of 3000 kg; the radius of curvature of the track at the bottom point of the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track? (g = 9.8 m/s2)
a. 2.3 104 N
c. 7.0 104 N
b. 4.7 104 N
d. 1.0 104 N
Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
Effect of changing a set point for hypothalamic values
Use of a hand tool to apply pressure to a trigger point.
Two-point discrimination
Finding the length given total distance and distance longer than other point
Chloroform has a boiling point of 61.1 degrees C and dichloromethane has a boiling point of 40 ...