CENTER OF MASS, MOMENTUM, IMPULSE, & COLLISION

A 0.15 kg baseball travelling in a horizontal direction with a speed of 20 m/s hits a bat and is popped straight up with a speed of 33 m/s. What is the impulse caused by hitting the ball?

• 5.60 kgm/s

• 6.25 kgm/s

• 4.95 kgm/s

• None of the choices

Tags

NGSS.HS-PS2-2

A 0.15 kg baseball travelling in a horizontal direction with a speed of 20 m/s hits a bat and is popped straight up with a speed of 33 m/s. What is the average force exerted on popping the ball straight up for 0.005 s?

• 830 N

• 780 N

• 650 N

• 390 N

Tags

NGSS.HS-PS2-1

In a particular crash test, a car of mass of 1500kg collides with a wall. The initial and final velocities of the car are – 10 mi/s and 1.23 mi/s, respectively. How much force was exerted if the test lasted for 1.21 sec?

• 17 983.56 N

• 19 332.05 N

• 15 729.86 N

• 13 921.49 N

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

In a particular crash test, a car of mass of 1500 kg collides with a wall. The initial and final velocities of the car are – 10 mi/s and 1.23 mi/s, respectively. What is the final momentum of the car?

• 3 143 kgm/s

• 2 214 kgm/s

• 1 550 kgm/s

• 1 845 kgm/s

Tags

NGSS.HS-PS2-2

In a particular crash test, a car of mass of 1500kg collides with a wall. The initial and final velocities of the car are – 10 mi/s and 1.23 mi/s, respectively. What is the initial momentum of the car?

• 13 500 kgm/s

• – 15 000 kgm/s

• 1 500 kgm/s

• – 9 230 kgm/s

Tags

NGSS.HS-PS2-2

A car of mass 2 542 kg stopped at a parking lot is bumped from the rear by a bicycle of 15 kg. If the bicycle is moving at 49 m/s before the collision, what is the velocity of the car and the bicycle after the collision?

• 0.13 m/s

• 0.95 m/s

• 0.29 m/s

• 0.57 m/s

Tags

NGSS.HS-PS2-2

A car of mass 2 500 kg stopped at a traffic light is struck from the rear by a 1 200 kg car. If the smaller car was moving at 20 m/s before the collision, what is the velocity of the entangled cars before the collision?

• 7.93 m/s

• 8.09 m/s

• 6.49 m/s

• 8.63 m/s

Tags

NGSS.HS-PS2-2

A system consists of two particles at different locations near the origin. Particle 1 has a mass of 7.89 kg and is located on the x-axis at x = –5.0 m while Particle 2 has 9.75 kg mass and is located at y = +8.0 m. What is the center of the mass of the two particles at x – axis?

• x = -1.68 mi

• x = -2.24 mi

• x = 2.18 mi

• x = 4.82 mi

A system consists of two particles at different locations near the origin. Particle 1 has a mass of 7.89 kg and is located on the x-axis at x = –5.0 m while Particle 2 has 9.75 kg mass and is located at y = +8.0 m. What is the center of the mass of the two particles at y – axis?

• y = 4.42 mj

• y = - 3.21 mj

• y = 5.03 mj

• y = - 1.25 mj

A system consists of two particles at different locations near the origin. Particle 1 has a mass of 7.89 kg and is located on the x-axis at x = –5.0 m while Particle 2 has 9.75 kg mass and is located at y= +8.0 m. What is the vector coordinates of the given problem?

• r = 4.82 mi – 3.21 mj

• r = -1.68 mi – 1.25 mj

• r = - 2.24 mi + 4.42 mj

• r = 2.18mi + 5.03 mj