A- In the space below, sketch the vertical displacement vs time trace of the centre of mass of a triple jumper during the final phase of a jump (i.e. from the take- off of the jump phase to landing in the sand). Then, sketch the corresponding vertical velocity vs time and acceleration vs time traces below.
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- A high jumper approaches the bar at 6.5 m/s horizontally. She experiences a vertical reaction force of 1555 N for a period of 0.28 s. If the high jumper weighs 698 N what is: (Remember projectile motion concepts) and draw an free body diagram. a) her resultant velocity immediately after leaving the ground? b) her angle of take-off c)What is the horizontal component of the velocity at c.2) the instant of release? c.3) the highest point? c.4) 0.33 seconds after release? d) What is the vertical component of the velocity at d.1) the instant of release? d.2) the highest point? d.3) 0.33 seconds after release? e) What is the acceleration? e.2) in the vertical direction? e.3) in the horizontal direction? please answer all parts, a-e.A rifle with a barrel length of 60 cm fires a 15 g bullet with a horizontal speed of 350 m/s. The bullet strikes a block of wood and penetrates to a depth of 13 cm. You may need to review (Page). For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Ready for takeoff. Part A What resistive force (assumed to be constant) does the wood exert on the bullet? Express your answer with the appropriate units. Part B. How long does it take the bullet to come to rest after entering the wood? Express your answer with the appropriate units.9 4a
- Part A The equation F propeller. In fact, there are two contributions to the thrust one positive and one negative. The positive contribution comes from air pushed backward, away from the propeller (so dm/dt 0) at speed V, equal to the speed of the airplane through the air. km/hPROBLEMI The 260kg crate shown in the figure rests on a horizontal surface for which the coefficient of kinetic friction is 025. If the crate is subjected to a 400 N towing force as shown determine the velocity of the crate in 5 s starting from rest PROBLEM 2 PROBLEM 3 The 80 kg block A shown in Figure is released from rest If the masses of the puleys and the cord are neglected determine the speed of the 12 kg block B in 38 m₁ P = 400 N IIA 8 = 30° 30° Consider the masses m, 20 kg and m, 18 kg in the system represented by the figure below. If the coefficient of friction is Of and the inclination angle is 30°, find the acceleration of the system and the tension in the cord joining two masses Datum m₂Given: The surface is frictionless, Two blocks in contact with each other move to the right across a horizontal surface by the two forces shown. 72 N 4.7 kg 9.7 kg 20 N Determine the magnitude of the force ex- erted on the block with mass 4.7 kg by the block with mass 9.7 kg. Answer in units of N.
- 9 2aPart A A rocket is at 0.019 of the distance between Earth and the Sun, closer to Earth. What is the ratio between the force on the rocket due to the Sun and the force on the rocket due to Earth? The mass of the Sun is 2.0 x 1030 kg and the mass of Earth is 5.97 x 1024 kg. Πνη ΑΣΦ F F. Submit Request Answer Next > Provide Feedback MacBook Air DII 80 888 F7 F4 F5 F2 & @ 2# $ % 7 2 4 Q W E R T 11 つ K D F く M C V ommand Option この * 00 つ エ BDetermine average force to fire pellet from rest 105m/s over 0.8m in a barrel (im assuming friction is implied)