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Question 13 (1 point) I 123-15 Given force-time graph for a 0.23 kg object that was accelerated from an initial velocity of 4.7 m/s, calculate
Question 13 (1 point) I" 123-15 Given force-time graph for a 0.23 kg object that was accelerated from an initial velocity of 4.7 m/s, calculate the final velocity at 5.0 5. Round your answer to the nearest whole number Your Answer: Question 14 (1 point) A 192.4 g tennis ball with an initial velocity of 55.6 m/s [south] hits a wall and rebounds with the same speed but in the opposite direction ([north]). The graph below shows the force of the wall on the ball during the collision. The value of Fmax is a.bc N. Record a.bc Do not include units in your answer. Your Answer: Answer Question 15 (1 point) When a blue whale is alarmed, it can swim at a velocity of 57.0 km/h [E] and has a momentum of 2.15x10 kg*m/s [E]. Given this information, this blue whale must have a mass of a.bcx10 kg. Input the values of a, b, c and dinto the blank and use the guidelines below: . In multistep calculations do not round until your final answer. Carry all digits through your calculations . Do not include units. . Do not include decimal place.Question 16 (1 point) Force-Time Graph E'J \\ I'nru' l \\| 0 1105 (um [I 1F {12le \"mo ls) This graph shows the relationship between the force on a 0.801 kg football and the time the kicker's foot is in contact with the ball. As a result of the kick, the football, which was initially at rest, is now moving at a speed of 28.5 m/s. The magnitude of the maximum force, Fmax, exerted on the ball during the kicking process, expressed in scientific notation, is a.bc x 10d N. Record the values of a, b, c and d. - Question 17 (1 point) Force on a Ball as a Function of'l'ime The net impulse delivered to the ball from t=0.0 to t = 6.05 is ab Ns. Record ab. Round answer to the nearest whole number. Do not include units in your answer. ~ Question 20 (1 point) A force of 25.0 N is exerted by a hockey player for 0.150 s on a 0.114 kg puck. If the puck was originally at rest, what is its speed on leaving the player's hockey stick? Q 219 m/s 0 19.0 m/s O 32.9 m/s 0 167 m/s Question 21 (1 point) A 0.85 kg ball is moving east at a velocity of 5.87 m/s when it hits a wall. If the ball rebounds with a velocity of 1.00 m/s west, what was the magnitude of the impulse of the wall on the ball? Round your answer to have 1 decimal place Your Answer: Answer Question 22 (3 points) Use Newton's second law to show how impulse is mathematically connected to momentum. Compare the units for momentum to the units for impulse. Are they the same?Question 23 (2 points) The following illustration shows two ways of providing impulse to change the momentum of a vehicle. In the top illustration, the vehicle collides with a massive concrete barrier. In the bottom illustration, the vehicle collides with water-filled barrels. Explain which type of crash barrier would likely produce less damage to the vehicle and less injury to the occupants. Your explanation should contrast the force of impact, time duration and the impulse for each scenario. Question 24 (4 points) A 50kg wooden crate is pushed with a constant force of 20 N for 35 seconds. After the 35 seconds has passed, the force decreases linearly back to 0 N for a time period of 10 seconds. a. Draw a force as a function of time graph to describe the force on the crate for the entire 45 seconds. b. What is the area under the graph that you have drawn? What does the area represent? You may insert an image in to your response by clicking on the camera icon
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