In the figure, the particles have charges q₁-42-247 nC and 93-94-98.8 nC, and distance a -5.25 cm. What are the (a) x and (b) y components of the net electrostatic force on particle 3?
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- = 4bdd655af6baf8ca630f9c91581eb955.pdf 2 1 2 2/2 Expo Fultsche 3. Speed Limits on Highway and Road Curves Scenario: Imagine a car travelling along a highway at 100 km/h [East] on a cold winter day. The car approaches an off ramp so the driver can turn south off the highway but as the car enters the curve it hits a patch of ice. i) Describe the initial motion of the car. ii) If the car begins to skid when it hits the ice, describe the motion of the car as the driver attempts to enter the curve. The faster the car is going initially, the greater the force required to get it to turn from its initial direction to a new direction. iii) Explain why highway designers usually post signs similar to the one below on tight curves and on/off ramps on roads and highways. 65 ↓e = 0, + wot +at? S = Or w = wo + at v = wr w? = w; + 2a(0 – 0.) atan = ar, a. %3D Tcom - (m,F + m2; + mz73 + .·) 1= E¡m;r? Mtotal An ultracentrifuge accelerates from rest to 9.93 x 10° rpm in 1.87 min. What is its angular acceleration in radians per second squared? angular acceleration: rad/s? What is the tangential acceleration of a point 8.90 cm from the axis of rotation? tangential acceleration: m/s? What is the radial acceleration in meters per second squared and in multiples of g of this point at full revolutions per minute? radial acceleration: m/s? radial acceleration in multiples of g:5. For the figure below, what are the magnitudes and directions of the following cross products? a. ₁ x ma = ? b. 7₂ x mã = ? C. ₁ XF = ? d. 7₂ x F = ? 0.6 m 7₁ TEN 72 0.6 m ma 0.8 m 0.8 m |ma|= 600 N |F|= 400 N