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€ Chrome File Edit View History Bookmarks People Window Help 100% Sat 11:10 PM JJ5521 c Chegg VA HW#7 C https:/ ne /www.webassign t/web/Student/Assignment-Responses/Mast?dept 654273#Q2 EE: App A&M; organizations TCC Miscellaneous PT WTC Hot Schedules Onli 7.61e-4 kca 2. C+ 2 points I Previous Answers OSColPhys17.2.012. My Notes Ask Your Teacher a) Calculate the force needed to bring a 950 kg car to rest from a speed of 90.0 km/h in a distance of 130 m (a fairly typical distance for a nonpanic stop) -2283 Suppose instead the ca hits a concrete abutment at full speed and is brought to a sto 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a i e. find the ratio of the force in part(b) to the force in part(a). 55 X (force in part (b) force in part (a Additional Materials Reading Submit Answer Save Progress Practice Another Version 3. C+ 3/3 points I Previous Answers OSColPhys1 7.2.014. My Notes Ask Your Teacher Boxing gloves are added to lessen the force of a blow. a) Calculate the force exerted by a boxing glove on an opponent's face, if the glove and face compress 7.00 cm during a blow in which the 6.00 kg arm and glove are brought to rest from an initial speed of 10.0 m/s. 4286 (b) Calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.000 cm Assume the total mass of the arm remains 6.00 kg.) 15000Explanation / Answer
I assume you only want the answer for part (b)
Apply v2=u2+2as ; where initial velocity(u)=90kmh-1
a=-625/4 ms-2;
Apply F=ma
Force exerted(F2)= 950*625/4= -148437.5 N;
Force calculated in part(a) let it be F1 =2283.7N
F2/F1 =64.99= 65
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