Physics 1 MIDTERM Questions & Answers

Physics 1 MIDTERM Questions & Answers 15 in = - ANSWER: 0.38 m 62 mph - ANSWER: 28 m/s 70 ft/s - ANSWER: 21 m/s A 0.52 kg bullfrog is sitting at rest on a level log. How large is the normal force of the log on the bullfrog? - ANSWER: 5.1 N A 1400 kg car is traveling along a straight road at 20 m/s . Two seconds later its speed is 21 m/s. What is the magnitude of the net force acting on the car during this time? - ANSWER: 700 N A 2300 kg truck has put its front bumper against the rear bumper of a 2500 kg SUV to give it a push. With the engine at full power and good tires on good pavement, the maximum forward force on the truck is 18,000 N. At this acceleration, what is the force of the SUV's bumper on the truck's bumper? - ANSWER: 9400 N A 2300 kg truck has put its front bumper against the rear bumper of a 2500 kg SUV to give it a push. With the engine at full power and good tires on good pavement, the maximum forward force on the truck is 18,000 N. What is the maximum possible acceleration the truck can give the SUV? - ANSWER: 3.8 m/s2 A 240 g block on a 52-cm-long string swings in a circle on a horizontal, frictionless table at 70 rpm. What is the speed of the block? - ANSWER: 3.8 m/s A 240 g block on a 52-cm-long string swings in a circle on a horizontal, frictionless table at 70 rpm. What is the tension in the string? - ANSWER: 6.7 N A 3500 kg truck is parked on a 7.0∘ slope. How big is the friction force on the truck? - ANSWER: 4200 N A ball rolling along a straight line with velocity 0.32 m/s goes from x = 2.8 m to x = 8.0 m . How much time does this take? - ANSWER: t = 16 s A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 8.3 m/s2. How far is the motorcycle from the car when it reaches this speed? - ANSWER: 38 m A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a stead