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1) A rocket ship at rest in space gives a short blast of its engine, firing 64 kg of exhaust gas out the back end with an average velocity of 504 m/s

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1) A rocket ship at rest in space gives a short blast of its engine, firing 64 kg of exhaust gas out the back end with an average velocity of 504 m/s. What is the change in momentum of the rocket during this blast?

 

2.A car traveling with an initial velocity of 10 m/s accelerates at a constant rate of 2.3 ?/?² for a time of 9 seconds. What distance does the car travel during this process?

(round to the nearest hundredth ex. 11.125 = 11.13)

 

3.A spring with a spring constant of 24 N/m is stretched a distance of 0.5 meters from its original unstretched position. What is the increase in potential energy of the spring?

 

4.A 4.2-kg block being pulled across a table by a horizontal force of 98 N also experiences a
frictional force of 2 N. What is the acceleration of the block in?

(round to the nearest tenth ex. 10.123 = 10.1)

 

5.A traveler covers a distance of 460 miles in a time of 8 hours. What is the average speed for this trip?

(round to the nearest tenth ex. 10.123 = 10.1)

 

6.It is estimated that 7 large pizzas are about right to serve a physics club meeting of 32 students. How many pizzas would be required if the group grew to 98 students?

(round to the nearest tenth ex. 10.123 = 10.1)

 

7.A bullet is fired horizontally with an initial velocity of 989 m/s at a target located 286 m from the rifle. How far does in centimeters does the bullet fall in the calculated time?

(g =  10 m/s²)

 

8.A ball is traveling at a constant speed of 6 m/s in a circle with a radius of 0.8 m. What is the
centripetal acceleration of the ball?

 

9.Yoda uses the force of 60 N used to push a chair across a room and does 300 J of work. How far does the chair move in this process?