An object moves in a circle of radius r at constant speed with a period t . if you want to change only the period in order to cut the object's acceleration in half, the new period should be

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?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

What do you think car designers do if the damage caused by a crash test is too severe?