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- A 45.0-kg child swings in a swing supported by two chains, each 3.10 m long. The tension in each chain at the lowest point is 340 N. Find the child's speed at the lowest point. m/sSam (75 kg) takes off (from rest) up a 50-m-high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 200 N. The thrust is turned off at the end of the ramp. How far does Sam land from the base of the cliff? Start 10⁰ 50 m 10⁰You throw a ball on planet X where g is not the same as on Earth. The figure below shows the vertical velocity of the ball after it leaves your hand. Air resistance is not important. v(m/s) 18.0 12.0 6.0 -6.0 -12.0 -18.0 1.0 2.0 3.0 t(s)
- Suppose the glider and the hanger had equal masses mG = mh . In this situation, do you expect the magnitude of the acceleration of the glider will be: Select all that apply: Greater than g Equal to g Less than gModel Mass Initial Velocity Final Velocity Speed Limit Road Conditions Time of Day Lamborghini Aventador 1,550 kg ?? 14.25 mph (6.64 m/s) Car A 35 mph (15.64 m/s) Icy 3:27 p.m. Based on the evidence, write a scientific explanation that determines whether or not Car A was speeding when it collided with Car B. Subaru Outback 2,100 kg 0 m/s 14.25 mph (6.64 m/s) Car BYou want the final speed at the bottom of your roller coaster hill to be 25 m/s. What is the height (h) of the hill to achieve this? Use g = 9.8 m/s2
- A crate with mass m = 20 kg is being pushed to the right by a force of magnitude F = 80 N The crate is placed on a rough horizontal coefficient of kinetic friction surface with a HK= 0.2 Take g = 10 m/s² The acceleration of the crate is: 3.8 m/s^2 O 2 m/s^2 O 6 m/s^2 4 m/s^2+y mg +x Surface is frictionless Pulley is massless and frictionlessQ3, Q,4 and Q5