Honors Physics Mid-Term Practice

1.)         A train normally travels at 35 m/s on a long straight stretch of level track. On this    particular day, the train makes a 6 minute stop for passengers at a station along this    track. If the train decelerates at rate of 1.5 m/s² and accelerates at a rate of           0.6 m/s²  back up to 35 m/s, how much time is lost in stopping at the station? 

2.)        A model car is moving horizontally at a constant rate of acceleration. At a distance                of 30.0 m from a zero reference point, its speed is 14.0 m/s and 2.5 s later it is at         the 100.0 m from the zero point. What is the model's acceleration?

3.)        A food distribution crew is in a helicopter descending at 6.5 m/s when they drop                    a food crate out of the hatch. The helicopter is 40.0 m high at the time. How long            does it take for the crate to reach the ground?

4.)         Algebraically combine the following vectors to get the net displacement of an          aircraft that has left the airport at the origin of the co-ordinate system:                       (round to the nearest whole km and degree)

            i.)         12 km @ 35°

            ii.)        10 km @ 70°

            iii.)       15 km @ 110°

5.)        A cannon shell slug leaves the barrel of a the gun at a speed of 575 m/s. Assuming     the shooter fired the slug at an angle of 18° above the horizontal how high did the         shell rise before it began traveling the down side of its trajectory?

8.)        What would the maximum range of a cannon shell be at the speed noted above?

            How long would it be in the air?

            What would its velocity be at a time of 23 seconds into its flight?

9.)        If a ball is released at a horizontal velocity of 75 m/s & a height of 15 m from the    ground how far from the base of the start pont will it land?

10.)       A car has a mass of 1500 kg and travels at a speed of 20 m/s. It requires a distance   of 15 m to stop. What is the magnitude of the acceleration & force that will produce   this result?

11.)       A boy pulls an 18 kg sled up 12° hill at a constant velocity. The value of m_k between the sled and the snow is 0.12. How much force does he need to pull on the rope with if he pulls parallel to the slope?

12.)       How much force does he need to pull with if he pulls a 30° angle to the slope?

13.)       A 4 kg block rests on a 15° incline m_k = 0.38. How much weight needs to be attached    to a hook on a cable to pull the block up the ramp at 2.25 m/s²?

14.)       A mass of 2.75 kg rests on top of a horizontal table. It has 2 cables connected to it.              One cable goes over a frictionless pulley off the right side of the table and           attaches to a mass of 1.50 kg. A second cable goes over another frictionless pulley       off the left side of the table and attaches to a mass of 3.2 kg. What value does m_s     have to at least be for the system to move at a steady speed of 2 m/s?

Honors Physics Mid-Term Practice

1.)         A train normally travels at 35 m/s on a long straight stretch of level track. On this    particular day, the train makes a 6 minute stop for passengers at a station along this    track. If the train decelerates at rate of 1.5 m/s² and accelerates at a rate of           0.6 m/s²  back up to 35 m/s, how much time is lost in stopping at the station? 

2.)        A model car is moving horizontally at a constant rate of acceleration. At a distance                of 30.0 m from a zero reference point, its speed is 14.0 m/s and 2.5 s later it is at         the 100.0 m from the zero point. What is the model's acceleration?

3.)        A food distribution crew is in a helicopter descending at 6.5 m/s when they drop                    a food crate out of the hatch. The helicopter is 40.0 m high at the time. How long            does it take for the crate to reach the ground?

4.)         Algebraically combine the following vectors to get the net displacement of an          aircraft that has left the airport at the origin of the co-ordinate system:                       (round to the nearest whole km and degree)

            i.)         12 km @ 35°

            ii.)        10 km @ 70°

            iii.)       15 km @ 110°

5.)        A cannon shell slug leaves the barrel of a the gun at a speed of 575 m/s. Assuming     the shooter fired the slug at an angle of 18° above the horizontal how high did the         shell rise before it began traveling the down side of its trajectory?

8.)        What would the maximum range of a cannon shell be at the speed noted above?

            How long would it be in the air?

            What would its velocity be at a time of 23 seconds into its flight?

9.)        If a ball is released at a horizontal velocity of 75 m/s & a height of 15 m from the    ground how far from the base of the start pont will it land?

10.)       A car has a mass of 1500 kg and travels at a speed of 20 m/s. It requires a distance   of 15 m to stop. What is the magnitude of the acceleration & force that will produce   this result?

11.)       A boy pulls an 18 kg sled up 12° hill at a constant velocity. The value of m_k between the sled and the snow is 0.12. How much force does he need to pull on the rope with if he pulls parallel to the slope?

12.)       How much force does he need to pull with if he pulls a 30° angle to the slope?

13.)       A 4 kg block rests on a 15° incline m_k = 0.38. How much weight needs to be attached    to a hook on a cable to pull the block up the ramp at 2.25 m/s²?

14.)       A mass of 2.75 kg rests on top of a horizontal table. It has 2 cables connected to it.              One cable goes over a frictionless pulley off the right side of the table and           attaches to a mass of 1.50 kg. A second cable goes over another frictionless pulley       off the left side of the table and attaches to a mass of 3.2 kg. What value does m_s     have to at least be for the system to move at a steady speed of 2 m/s?