HW 3 - HW 3 1) A car traveling at 69 km/h hits a bridge...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
HW 3 1) A car traveling at 69 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 57 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force (assumed constant) acts on the passenger’s upper torso, which has a mass of 39 kg? 2) A car that weighs 1.4 × 10 4 N is initially moving at a speed of 35 km/h when the brakes are applied and the car is brought to a stop in 18 m. Assuming that the force that stops the car is constant, find the magnitude of that force. Find the time required for the change in speed. If the initial speed is, instead, twice as great, and the car experiences the same force during the braking, how is the stopping distance changed?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How is the stopping time changed? (There could be a lesson here about the danger of driving at high speeds.) 3) A certain force gives mass m 1 an acceleration of 12.5 m/s 2 and mass m an acceleration of 3.8 m/s 2 . What acceleration would the force give to an object with a mass of (m
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

HW 3 - HW 3 1) A car traveling at 69 km/h hits a bridge...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online