The position of a dragonfly that is flying parallel to the ground is given as a function of time by F = [2.90 m + (0.0900 m/s²)t²]i- (0.0150 m/s³)t³ j. Part A At what value of t does the velocity vector of the insect make an angle of 34.0° clockwise from the x-axis? Express your answer with the appropriate units. t = 2.70 s Submit ✓ Correct Part B At the time calculated in part (a), what is the magnitude of the acceleration vector of the insect? Express your answer with the appropriate units. Previous Answers O a = 0.33 Submit μÀ 1 m S² ? Previous Answers Request Answer X Incorrect; Try Again; 25 attempts remaining

A physics book slides off a horizontal table top with a speed of 1.20 m/s. It strikes the floor after a time of 0.450 s. Ignore air resistance. Part A Find the height of the table top above the floor. Express your answer with the appropriate units. h = Submit Part B Value x = Request Answer Find the horizontal distance from the edge of the table to the point where the book strikes the floor. Express your answer with the appropriate units. Units Value Units

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A displacement vector points in a direction of θ = 23° left of the positive y-axis. The magnitude of this vector is D = 155 m. Refer to the figure. Enter an expression for the x-component vector, Dx, in terms of D, θ, and the unit vectors i and j.

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A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of positive x axis. The resultant displacement has a magnitude of R = 138 cm and is directed at an angle of direction of the second displacement. Step 1 The diagram suggests that d, is larger than either of the other vectors and is in a fourth-quadrant direction. 2 d₁ Then d₂ = R-d₁ 1 Substituting, d 2 y Step 2 We will use the component method for a precise answer. We already know the resultant displacement, so the algebra of solving a vector equation will guide us to do a subtraction. Step 3 The resultant displacement of the mop is R = ď₁ + 1 2 = = 19₂ R (138 138 cm at 33.0°) - 157 Step 4 The meaning of the negative sign reverses the direction of the second vector so we can rewrite the previous equation as (138 cm at 33.0°) + (157 cm at 33 X The response you submitted has the wrong sign.º), which, in components, is d₂ = [138 cos 33 + 138 sin 125 Your response..differs from the correct…

The path of motion of a 7-lblb particle in the horizontal plane is described in terms of polar coordinates as rr = (2 tt ++ 1)ftft and θθ = (0.5 t2t2 −− tt) radrad, where tt is in seconds.

A baseball hit just above the ground leaves the bat at 32 m/s at 45° above the horizontal. ▼ Part A How far away does the ball strike the ground? Express your answer to two significant figures and include the appropriate units. TR= H μА Value Submit Request Answer Units < Return to Assignment Provide Feedback ?

The minute hand on a watch is 1.00 cm in length. Use a coordinate system in which the y-axis points toward the 12 on the watch face. Part A What is the displacement vector of the tip of the minute hand from 8:00 to 8:20 a.m.? Enter the x and y components of the displacement vector in centimeters separated by a comma. ► View Available Hint(s) Arx, Ary: = Submit || ΑΣΦ Previous Answers ? cm

After Physics Lab, a student undergoes displacements (moves) -60 m East +20 m North. a. What was the magnitude and angle for their total displacement?