Physics, 16.02.2020 02:04 gwendallinesikes
8) A racecar accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the
acceleration of the car.
9) A skater goes from a standstill to a speed of 5.7 m/s in 10 seconds. What is the
acceleration of the skater?
10) As a shuttle bus comes to a normal stop, it slows from 9.9 m/s to 0.0 m/s in 5 s. Find the
average acceleration of the bus.
11) During a race, a sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25s. What
is the sprinter's average acceleration during this period?
12) A baby sitter pushing a stroller starts from rest and accelerates at a rate of 0.6 m/s. What
is the velocity of the stroller after it has traveled for 4.75 minutes?
13) A skier, starting from rest, accelerates down a slope at 2.2 m/s?. How fast is she going
after 5.0 s?
14) The head of a rattlesnake can accelerate at 50 m/s in striking a victim. How
long would it take to reach a speed of 28 m/s from rest?
Answers: 3
Physics, 21.06.2019 19:30
Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?
Answers: 3
Physics, 21.06.2019 22:40
Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.
Answers: 3
Physics, 22.06.2019 19:50
What are the dimensions of the cross section that passes through the points a, f, g, and d?
Answers: 2
Physics, 22.06.2019 22:00
On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m
Answers: 1
8) A racecar accelerates uniformly from 18.5 m/s to 46.1 m/s in 2.47 seconds. Determine the
acc...
acc...
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