7. An object of mass m = 5.00 kg, attached to a spring scale, rests on a frictionless, horizontalsurface as shown in the figure below. The spring scale, attached to the front end of a boxcar,reads zero when the car is at rest.(a) Determine the acceleration of the car if the spring scale has a constant reading of 18.0 Nwhen the car is in motion.(b) What constant reading will the spring scale show if the car moves with constant velocity?(c) Describe the forces on the object as observed (i) by someone in the car and (ii) by someoneat rest outside the car.m

a)Step 1:When the car is accelerating, the spring force has a constant reading of 18N.Let a be the…

Answered: 7. An object of mass m = 5.00 kg,…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter2: Newton's Laws

Section: Chapter Questions

Problem 19P: . Under certain conditions, the human body can safely withstand an acceleration of 10 g. (a) What...

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Similar questions

. Under certain conditions, the human body can safely withstand an acceleration of 10 g. (a) What net force would have to act on someone with mass of 50 kg to cause this acceleration? (b) Find the weight of such a person in pounds then convert the answer to (a) to pounds.
A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant force acting on it? (b) If this same force is applied to a 4.0-kg object, what acceleration is produced?
. The Kingda Ka roller coaster in New Jersey is the world’s tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57 m/s (128 mph) in just 3.5 s. (a) What is the acceleration experienced by passengers on this ride in m/s2? In g’s? (b) If a certain passenger has a mass of 65 kg, what is the force in newtons that acts on him during the launch phase of this ride? What is the force in pounds?
The weight of an astronaut plus his space suit on the Moon is only 250 N. How much do they weigh on Earth? What is the mass on the Moon? On Earth?
Two forces F1 and F2 act on a 5.00-kg object. Taking F1 = 20.0 N and F2 = 15.0 N, find the accelerations of the object for the configurations of forces shown in parts (a) and (b) of Figure P5.19. Figure P5.19
A black widow spider hangs motionless from a web that extends vertically from the ceiling above. If the spider has a mass of 1.5 g, what is the tension in the web?
What is the unbalanced force acting on a moving car with a constant velocity of 25 m/s (56 mi/h)?
A force F applied to an object of mass m1, produces an acceleration of 3.00 m/s2. The same force applied to a second object of mass m2 produces an acceleration of 1.00 m/s2. (a) What is the value of the ratio m1/m2,? (b) m1 and m2 are combined into one object, find its acceleration under the action of the force F.
An object of mass m = 5.00 kg, attached to a spring scale, rests on a frictionless, horizontal surface as shown in Figure P6.14. The spring scale, attached to the front end of a boxcar, reads zero when the car is at rest. (a) Determine the acceleration of the car if the spring scale has a constant reading of 18.0 N when the car is in motion. (b) What constant reading will the spring scale show if the car moves with constant velocity? Describe the forces on the object as observed (c) by someone in the car and (d) by someone at rest outside the car. Figure P6.14
The systems shown in Figure P5.28 are in equilibrium, If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline in Figure P5.28d are frictionless. Figure P5.28
. As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. (a) What is the baseball’s acceleration in m/s and in Ws? (b) What is the size of the force acting on it?
The engines in a supertanker carrying crude oil produce a net force of 20,000,000 N on the ship. If the resulting acceleration is 0. 1 m/s2, what is the ship’s mass?

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