Airbags are used in cars because they A) Decrease the impulse of a collision B) Decrease the momentum of a collision C) Increase the time of impact of a collision D) Increase the force with which you hit the dashboard
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- Many years ago cars were manufactured to be as rigid as possible today's cars are designed to crumple upon impact explain why in terms of momentum and impulse.TONE ATE- CLEANSE 4 Assignment Booklet 4B 13. A car travelling 100 km/h comes to a stop in 100 m when the brakes are applied. An identical car travelling 100 km/h comes to a stop when it hits a bridge abutment. Which of the following statements is true? A. The change in velocity when the car hits the bridge is greater. B. The change in momentum for the car that braked is greater. C. The impulse of the car hitting the bridge is greater. D. The impulse is the same for both cars. 14. If you lengthen the time during a car crash for the occupants of the car to come to a stop, the forces they experience A. decrease and the impulse decreases B. increase and the impulse stays the same C. decrease and the impulse stays the same D. increase and the impulse increases Wet force did the vehicle .3-A 20 g bullet is shot toward a relatively thin wooden block. The speed of the bullet before hitting the block is 200 m/s. The bullet passes through the block and continues with a speed of 50 m/s. a) How much is the impulse imparted on the bullet. b) If the bullet spends 0.02 s inside the block, what is the average force exerted on the bullet. edt zwollol bns soad yew all no qme or no abral do
- A 0.10-kg object with a velocity of 0.20 m/s in the +x direction makes a head-on elastic collision with a 0.15 kg object initially at rest. What is the final velocity of the 0.10-kg object after collision? Group of answer choices: A) +0.16 m/s B) +0.040 m/s C) -0.16 m/s D) -0.040 m/sThe impulse - momentum theorem states that the impulse on an object is equal to:A. The change in its velocityB. The change in its accelerationC. The change in its momentum D. The change in its kinetic energySafety standard dictate that modern cars had cushioned (padded) dashboards. Why is this? a) They decrease the momentum of a collision. b) They increase the force of impact in a collision. c) They decrease the impulse in a collision. d) They look nice and feel good. e) They increase the time of impact in a collision.
- 4) You drop a golf ball from a height of 1 m above the ground. It hits the ground and returns to a height of 0.5 m. Your friend makes the following argument: "The impulse Earth imparts to the golf ball as it falls must be larger than the impulse the ground imparts when the ball bounces because the time interval over which Earth exerts a force on the ball is much larger than the time interval over which the ground exerts a force on the ball." Draw one or more momentum bar charts and use them to explain either your friend is right or wrong.A baseball (m=0.14 kg) with initial velocity of -40 m/s is hit. It leaves the bat with a velocity of 60 m/s after 0.01 s. a) calculate the impulse b) calculate the average net force applied to the ball by the batQ25
- Consider eight 910 KG car initially moving at 31 m/s What is the velocity of the car in meters per second just after the car hit 175 KG deer initially running at 15 m/s in the same direction as in the day remains on the car 2.) Cart 1 with mass of 4 kg moves along a frictionless track with a velocity of 2 m/s. collides with Cart 2 with a mass 3 kg moving in the same direction at a speed of 1 m/s . After the collision, Cart 1 continues in the same direction with a velocity of 1 m/s . What is the velocity of Cart 2 after the collision?A 156-gram baseball is hit toward the left by a bat. The magnitude of the force the bat exerts on the ball as a function of time is shown in (Figure 1). -magnitude of impulse = 12 N*s -Magnitude of the ball's velocity when it is at rest = 77 m/s a)what is the magnitude of the ball's velocity after it is hit if it is initially moving to the right at 31 m/s b)what is the direction of this velocity?