(100 kg) v2 TA (3x

Mass #1 = 60g Mass #2 = 140g Acceleration #1 = 3.6169 Acceleration #2 = 3.712 Acceleration #3 = 3.675   Experimental Acceleration Net Force (experimental)

Imagine a skydiver with a mass of m jumping out of an airplane at an altitude of h. As the skydiver descends, they experience two forces: air resistance and gravity. The force of air resistance varies with time and is described by the following function, where t is the time in seconds since t e skydiver has jumped: vec 2 (F)(t) = (0.5t)ha (x) + (0.11 +0.3t)hat(y) a) Create a air free body diagrar for the skydiver at t = 2 seconds. b) - What is the net for e acting on the skydiver at t = 2 seconds? c) What i the magnitude of the acceleration of the skydiver at t = 2 seconds? Imagine a skydiver with a mass of m jumping out of an airplane at an altitude of h. As the skydiver descends, they experience two forces: air resistance and gravity. The force of air resistance varies with time and is described by the following function, where t is the time in seconds since the skydiver has jumped: Fair (t) = (0.5t)2 + (0.12 + 0.3t)ŷ a) Create a free-body diagram for the skydiver at t = 2 seconds.…

A commercial jet is coming in for landing. Just before it hits the runway it is moving 76m/s. Plane has a mass of 20,000kg. The runway is 1.6km long and the plane needs to stop before the end of the runway. How large is the braking force the airplane needs to stop safely?

A physics student, in a stationary elevator, places a 240.0 g mass on an electronic balance. The student hits the elevator button and it begins to move upwards. While the elevator is moving, the student records this information Time = 0 to 3.0 sec the balance reads 278 grams Time = 3.0 - 12 sec the balance reads 240. grams Time = 12.0 to 15.0 sec the balance reads 192 gram How far up (in meters) did the elevator travel? Consider: UP to be (+), DOWN to be (-) and g =9.8 m/s2 .  ROUND YOUR ANSWER TO A WHOLE NUMBER of meters (no decimal places) HINT: This problem requires finding THREE different displacements and adding them up! 2nd HINT:  You will need to (A) use your equations of motion or (B) make a v-t graph to find those displacements!

Two forces act on a body. One of them is 7î – 13ĵ. What is the value of the other force? a) 7î – 13ĵ b) -7î + 13ĵ c) 7î + 13ĵ d) -7î – 13ĵ

السؤال 34 One of the following could be a kinetic friction coefficient Hk: 0.15 N O 0.15J O 0.15 O 0.15 N/m Up O

Jennifer is walking at 1.22 m/s. If Jennifer weighs 552 N, what is the magnitude of hermomentum?A) 97.0 kg  m/sB) 137 kg  m/sC) 68.6 kg  m/sD) 672 kg  m/sE) 951 kg  m/s

For a short period of time, the frictional driving force acting on the wheels of the 2.3-Mg van is FD = (600+2) N, where t is in seconds. (Figure 1) Figure FD 1 of 1 Part A If the van has a speed of 22 km/h when t= 0, determine its speed when t = 5 s. Express your answer to three significant figures and include the appropriate units. CHμA V = 3.32 Submit m Provide Feedback S ? Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining

Princess Leia once fell out of the spaceship.  She came back with the Force.  From the farthest spot (zero speed) back to the spaceship was 10 meters, and it took 4 second.  She weighed 45 kg.  Assume constant force during this trip.  Find the force needed.