A student begins at rest and then walks north at a speed of v₁ = 0.85 m/s. The student then turns south and walks at a speed of v2 = 0.33 m/s. Take north to be the positive direction. Refer to the figure. the trip? d = S m N If the student travels in the stated directions for 30.0 s at speed v₁ and 20.0 s at speed v2, what is the net displacement, in meters, during

What is the x-coordinate of the object when t=10

A physics professor did daredevil stunts in his spare time. His last stunt was an attempt to jump across a river on a motorcycle (Figure 1). The takeoff ramp was inclined at 53.0°, the river was 40.0 m wide, and the far bank was 15.0 m lower than the top of the ramp. The river itself was 100 m below the ramp. You can ignore air resistance.

For each graph of vx vs. t in the left column, choose the letter (a-i) corresponding to the appropriate description of motion. Not all descriptions will be used. Assume the usual coordinate system (+x to the right, +y up, +z out of the page). a. A cart moves to the right, gradually slowing down. qv Ux by hv Uxi X Ux Ux Ux dv Ux Additional Materials eBook b. A cart moves to the right, gradually slowing down, stops, and moves to the left, speeding up. c. A cart moves to the left at constant speed. d. A cart moves to the right, gradually speeding up. e. A cart remains stationary and does not move. f. A cart moves to the right at constant speed. g. A cart moves to the left, gradually slowing down. h. A cart moves to the left, gradually slowing down, stops, and moves to the right, speeding up. i. A cart moves to the left, gradually speeding up.

Driving down the road at a speed of 23.9 m/s, you suddenly notice a fallen tree blocking the road a distance of 82.0 m ahead of you. You step on the brake pedal and decelerate at a constant rate. What must the magnitude of your acceleration be so that you will come to a stop 6.6 m in front of the tree?   a. 3.79 m/s^2   b. 3.48 m/s^2   c. 3.22 m/s^2   d. 7.58 m/s^2

you and your best friend are away on vacation. Your hotel room is on the 5th floor. you and your friends decide to practice your aiming skills by dropping water balloons from the balcony of your hotel room. You drop a balloon from the ledge and it accelerates uniformly to the ground. a. If the balcony is 25m above the ground, how long does it take the balloon to reach the ground? b. What is the final velocity of the balloon just before it hits the ground? c. Draw a representative position vs time graph for the motion described above and describe the motion.

▼ Part A A walker and a runner are on a straight horizontal section of a track. In the reference frame of the Earth, the walker has an initial position XEwi = +5.0 m and the runner has an initial position XEri+15.0 m. Three seconds later, the walker has a position XEwf = +11 m and the runner has a position XErf +3.0 m. What is the runner's velocity in the reference frame of the walker, vwr? ► View Available Hint(s) O Vwr= -2.0 m/s O Vwr=-6.0 m/s O VW-18.0 m/s O Vwr= -4.0 m/s Review Submit

I only need help with "part b"

A truck travels around a circular track. The position of the truck is described by the equations (400 · cos 0) m and 0 = (0.002 · t) rad, where t is in seconds. r = r = f@) Using cylindrical coordinates, a. Determine the truck's radial and transverse components of velocity at t = 4 s, v, and vo. b. Determine the truck's radial and transverse components of acceleration at t = 4 s, a, and ag.

When the motorcyclist is at A, he increases his speed along the vertical circular path at the rate of v = (0.04s) ft/s² where s is in ft. Take p = 270 ft. ▼ Part A V If he starts at V₁ = 2 ft/s where s = 0 at A, determine the magnitude of his velocity when he reaches B. = Express your answer to three significant figures and include the appropriate units. μÅ Value Units Submit Part B = P 0 O μà 60° Submit Also, what is his initial acceleration? Express your answer to three significant figures and include the appropriate units. Value Units Request Answer P Request Answer ? ?