numericforces7-18

numericforces7-18 - TYPICAL NUMERIC QUESTIONS FOR PHYSICS I...

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TYPICAL NUMERIC QUESTIONS FOR PHYSICS I REGULAR QUESTIONS TAKEN FROM CUTNELL AND JOHNSON CONTENT STANDARD IC, ID FORCES 1. When the net force that acts on a hockey puck is 10 N, the puck accelerates at a rate of 50 m/s 2 . Determine the mass of the puck. A) 0.2 kg B) 1.0 kg C) 5 kg D) 10 kg E) 50 kg 2. A 15-N net force is applied for 6.0 s to a 12-kg box initially at rest. What is the speed of the box at the end of the 6.0-s interval? A) 1.8 m/s B) 15 m/s C) 3.0 m/s D) 30 m/s E) 7.5 m/s 3. A 810-kg car accelerates from rest to 27 m/s in a distance of 120 m. What is the magnitude of the average net force acting on the car? A) 740 N B) 2500 N C) 91 N D) 1300 N E) 7900 N 4. Two forces act on a 4.5-kg block resting on a frictionless surface as shown. What is the magnitude of the horizontal acceleration of the block? A) 1.8 m/s 2 B) 1.2 m/s 2 C) 0.82 m/s 2 D) 3.2 m/s 2 E) 8.9 m/s 2 Page 1
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Use the following to answer question 5: A 70.0-kg astronaut pushes to the left on a spacecraft with a force F in "gravity-free" space. The spacecraft has a total mass of 1.0 × 10 4 kg. During the push, the astronaut accelerates to the right with an acceleration of 0.36 m/s 2 5. Determine the magnitude of the acceleration of the spacecraft. A) 51.4 m/s 2 D) 7.0 × 10 3 m/s 2 B) 0.36 m/s 2 E) 3.97 × 10 4 m/s 2 C) 2.5 × 10 3 m/s 2 6. A 44-kg child steps onto a scale and the scale reads 430 N. What is the magnitude of the normal force acting on the child?
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This note was uploaded on 03/14/2011 for the course PHYSICS 105 taught by Professor Kruse,m during the Spring '08 term at Duke.

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numericforces7-18 - TYPICAL NUMERIC QUESTIONS FOR PHYSICS I...

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