For numeric response questions (short answer) make sure that you carefully round your answers as instructed in the question! Question 1 (1 point) An average force of 14 N acts on an object for 0.26 seconds. The change in momentum is ab Nos. Input your answer in the format a.b - Do not include units 0 Include a decmial Your Answer: S Answer Question 2 (1 point) If a 900.0-kg truck is travelling at 60 km/hr and a 500.0-kg car is travelling at 60 km/hr, which of the following is true? 0 The magnitude of momentum of the truck is larger than the car. O The magnitude of momentum of the car is larger than the truck. 0 Both objects have the same magnitude of momentum. Previous Page Next Page Page 1 0f 12 Question 3 (1 point) A hockey puck has a momentum of 2.5 kg*m/s [E]. If its velocity is 11 m/s [E], it has a mass of a.bc kg. Input the values of a, b, and cinto the blank and use the guidelines below: - Do not include units. - Do not include decimal place. [:1 Question 4 (1 point) As a child catches a ball, he exerts a force, F, on the moving ball for a time interval of At. The mass of the ball is 250g and its velocity changes from +5.00 m/s to +1.00 m/s as a result of the force. The magnitude of the impulse that the child applies to the ball is Q 2.50 Ns Q 1.00 NS 0 1.00 x 103 NS 0 1.25 Ns Question 5 (1 point) A ball has a momentum of 3.81 kg-m/s [E]. If its speed is 19.1 m/s the mass of the ball is _____ kg. Your Answer: Answer Question 6 (1 point) A 14 kg object travels 10.7 m [east] in in 3.4 5. Assuming uniform velocity, the momentum of the object is a kgm/s [east], What is the value of a ? Round your answer to the nearest whole number. Do not include units in your answer. Your Answer: Answer Question 7 (1 point) If a 525 kg boat is heading east with a momentum of 661 kg*m/s [E] The velocity of the boat is a.bcm/s [E]. Input the values of a, b, and c into the blank and use the guidelines below: 0 Do not include units. . Do not include a decimal. [t Question 8 (1 point) An 7.00 g bullet travelling at (3.89x10A2) m/s goes through a stationary block of wood in 3.91x10'4 5, emerging at 101 m/s. The magnitude of the average force the wood exerted on the bullet is N 0 Input your answer with correct sig digs 0 Include a decimal 0 Do not include units Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 C] Answer Question 9 (1 point) A 517 g toy car travels along the sidewalk at 21 km/h. What is the momentum of the car in kgm/s? Round your answer to have one digit after the decimal. Your Answer: S Answer Question 10 (1 point) The graph below represents the net force acting on a small rocket launched vertically from rest. 100 .0 80.0 I orcc (in .(l (N) 40 .0 20.0 I] 2.0 4.0 6.0 3.0 I00 Time (5} If the mass of the rocket is 4.7 kg, the final velocity over 8.0 s time period is abc m/s. Record abc. Your Answer: [: Question 11 (1 point) A 6.781 x 103 kg car accelerates uniformly from rest to 8.705 m/s in 14.301 5. What was the net force acting on the car? Round your answer to the nearest whole number Your Answer: Answer Question 12 (1 point) A force is applied to a 202 g cart which is initially at rest as shown on the graph below: F. (N) 1500- 1000 500 0 f (ms) 2 8 -500 -1000 What is the magnitude of the final velocity of the particle at t=8 ms? Round your answer to the nearest whole number. Do not include units in your answer. Your Answer: