A car traveling at 43 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 51 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger's upper torso, which has a mass of 37 kg? Number i Units
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- Brad is the catcher for the Varsity baseball team. He exerts a forward force on the 0.145-kg baseball to bring it to rest from a speed of 38 m/s. During the process, his hand recoils a distance of 0.13 m. Determine the force which is applied to the baseball by Brad. a) -1.42N b) -805 N c) -142 NHank and Harry are two ice skaters whiling away time by playing 'tug of war' between practice sessions. They hold on to opposite ends of the same rope and pull the other toward him. The magnitude of Hank's acceleration is 1.58 times greater than the magnitude of Harry's acceleration. What is the ratio of Hank's mass to Harry's mass?A box of mass 400 kg is supported on a spring scale on the floor of a goods lift. The mass of the lift is 1900 kg. The lift is travelling from the 20th floor to the ground floor. At an instant when the deceleration of the lift is 1.2 ms-2 as it approaches the ground floor, what is the reading recorded by the scale? 1. 351 kg 2. 387 kg 3. 449 kg 4. 461 kg
- A skater of mass m standing on ice throws a stone of mass M with speed v in a horizontal direction. Find the distance over which the skater will move in the opposite direction if the coefficient of kinetic friction between the skater and the ice is ?k. (Use any variable or symbol stated above along with the following as necessary: g.) Δx =As shown above an adhesive has been applied to contacting faces of two blocks so that the blocks interact with an adhesive force that has a magnitude, Fadhesion. A tension, T, is exerted by a wire attached to the upper blocks causing the blocks to remain at rest. The two blocks have weights, Wbottom and Wtop. Which of the following must be true? Wtop=T Wbottom=Fadhesion T=Wtop−Fadhesion T=Wbottom+Wtop+FadhesionA block of mass 5.00 kg is initially at rest on a horizontal table. A string connects this block to another block of mass m = 2.00 kg that is suspended some distance above the ground. The string runs over a pulley. Ignore the mass of the string and pulley and assume the pulley is frictionless. The table has a coefficient of static friction of 0.48 and a coefficient of kinetic friction of 0.35.a) Draw a free-body diagram for the 5.00 kg block.b) Draw a free-body diagram for the 2.00 kg block.c) Is the system in equilibrium? Answer yes or no and justify your answer.d) If your answer to (c) is YES, what is the tension in the string? OR If your answer to (c) was NO, what is the magnitude of the acceleration of the system?
- A car of mass 800 kg as shown in the figure is subject to three forces F1, F2, and F3. The two forces F1=1000 N and F2=500 N are directed along the +X direction. Third force F3 is not shown in the figure. Ignore the effect of frictional force exerted by the tires on the road. a) Suppose the car is stationary, then what is the direction and magnitude of the force F3? b) The car started moving and attained a velocity of +500 m/s in 10 second due a change in F3. What will be the new direction and magnitude of the the force F3? c) How far does the car traveled during this 10 second time interval?Two boxes are at rest on a smooth, horizontal surface. The boxes are in contact with one another. If box 1 is pushed with a force of magnitude F = 12.6 N, the contact force between the boxes is 9.00 N; if, instead, box 2 is pushed with the force F, the contact force is 3.60 N. In either case, the boxes move Part A together with an acceleration of 1.80 m/s What is the mass of box 1? kg Submit Request Answer Part B What is the mass of box 2?The heaviest invertebrate is the giant squid, which is estimated to have a weight of about 0.36 tons spread out over its length of 37 feet. What is its weight in newtons? N
- A net force is applied in the positive directions to an object moving in one dimension. The graph of the force is below. The mass the object is 2.00kg . If the initial velocity of the object is m -1.00- what is the velocity of the object after this force is applied? S 4 1 2 3 4 time (s) force (N)An object of mass m = 1.00 kg is observed to have an acceleration of a with a magnitude of 23.6 m/s² in a direction 0 = 63.5° east of north. The figure below shows a view of the object from above. The force F₂ acting on the object has a magnitude of 10.5 N and is directed north. Determine the magnitude and direction of the force F₁ acting on the object. 2 1 N magnitude direction East m F₁A 945.0kg car traveling rightward at 22.6 m/s slams on the brakes and skids to a stop (with locked wheels). If the coefficient of friction between tires and road is 0.9710, determine the force of friction. Use correct number of significant figures in answer Force =