DUE TONIGHT, NEED TO CONFIRM ANSWERS A child of mass 50kg swings down in a circular arc on a rope that is 2 m long. At the bottom of the swing, she has a tangential speed of 8m/s. the net centripetal force on the child ar the bottom of the swing is most nearly...
A. 1600 N
B. 800 N
C. 320 N
D. 200 N

for the same child, at the instant she is at the bottom of the swing, the direction of the centripetal force will be...
A. up
B. down
C. right
D. left​

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r⃗ =[2.90m+(0.0900m/s2)t2]i^− (0.0150m/s3)t3j^. a: at what value of t does the velocity vector of the insect make an angle of 34.0 degree clockwise from the x-axis? b: at the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? c : at the time calculated in part (a), what is the direction of the acceleration vector of the insect?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p