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- Before beginning projectile motion problems, you need to __________. Choose the correct letter. a. Split the horizontal motion and vertical motion .b.Consider the impact of air resistance c. Solve for the acceleration due to gravity d. Determine the surface area of the projectile6. rises/last?dep=28433191 0 Update DETAILS Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 74.0 N, the second a force of 95.0 N, friction is 18.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select all that apply.) the children outside the wagon the child in the wagon the wagon (b) Draw a free-body diagram, including all forces acting on the system. Ĵ F₂ ++ F₂ W MacBook Air DD F6 O F₁ F2 12 N Ĵ F3 F₂ I LA F4 O % F5 & AA F7 DII . F9 7 F10 5 4 F11a. Solve the acceleration of the man b. Solve the velocity of the man with respect to the car c. Solve the magnitude of the normal acceleration of the car.
- Q Next diagram shows relationship between aelocity and time of a body moving along shown path. Let me see physical touches in your answer, not just mathematical notes. O Find the average acceleration of the object during the time intervals (0-5) . (5-15) s (0-20) s i) Find the instantaneous acceleration at 2. 10s, 18s (ii) Find the displacement between (10-20) s. v (m/s) 8 6 4 2 I (s) 20 15 -2 -4 -6 -8 lConstant The acceleration of a stone is given by az (t) = -2.04 m/s + (3.10 m/s )t. %3D Part A What is the initial velocity VOz such that the stone will have the same x-coordinate at time t = 3.90 s as it had at t =0. Express your answer in mneters per second. ΑΣΦ m/s Submit Request Answer Part B Find the velocity at time t = 3.90 s? Express your answer in meters per second. ΑΣΦ m/sA car parked at the top of a 14º slope loses its braking system and starts rolling down the slope traveling 50 m before running into a bush Part A What is the acceleration of the car? (Assume there is no friction or air resistance). Part B What is its speed just before it hits the bush?
- Consider the following descriptions of the vertical motion of an object subject only to the acceleration due to gravity. Begin with the acceleration equation a(t) = v'(t)= g, where g= -9.8 m/s?. a. Find the velocity of the object for all relevant times. b. Find the position of the object for all relevant times. c. Find the time when the object reaches its highest point. What is the height? d. Find the time when the object strikes the ground. A softball is popped up vertically (from the ground) with a velocity of 30 m/s.Consider the following descriptions of the vertical motion of an object subject only to the acceleration due to gravity. Begin with the acceleration equation a(t) = v'(1) = g, where g= -9.8 m/s?. a. Find the velocity of the object for all relevant times. b. Find the position of the object for all relevant times. c. Find the time when the object reaches its highest point. What is the height? d. Find the time when the object strikes the ground. A softball is popped up vertically (from the ground) with a velocity of 30 m/s.You've always wondered about the acceleration of the elevators in the 101-story-tall Empire State Building. One day, while visiting New York, you take your bathroom scale into the elevator and stand on it. The scale reads 150 Ib as the door closes. The reading varies between 130 lb and 170 lb as the elevator makes its upward journey.
- KINEMATICS OF PARTIC. AND RIGID BODIES A.) The position of the particle moving along a straight line is defined by the relation X = t^3 - 6t^2 -15t +40 where x is in ft. and t is in sec. Det. The time at which its velocity will be zero.The graph to the right shows the speed of a truck as it moves along a straight, level road. Which of the following describe a method to determine the distance d the truck travels during the 10 s time interval shown? Select two answers. a Multiply the average speed of 18 m/s by the 10 s travel time. b Calculate the area under the line in the graph. c Multiply half the initial speed of 30 m/s by the 10 s travel time. d Calculate the slope of the line in the graph to determine the acceleration a and then use d = (1 2) 2 at , where t is the travel time.A 710.0 kg boulder is raised from a quarry 105 m deep by a long chain having a mass of 600.0 kg. This chain is of uniform strength, but at any point it can support a maximum tension no greater than 2.50 times its weight without breaking. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of An air track in a physics lab. Part A What is the maximum acceleration the boulder can have and still get out of the quarry? Express your answer with the appropriate units. HÀ ? Value Amax Units Submit Request Answer