A speed skater, when viewed from above, has an initial velocity
of 25 ft/s T and 4 seconds
later a final velocity of 25 ft/s 407 Determine the skater's
average acceleration.
A speed skater, when viewed from above, has an initial velocity of 25 ft/s T and...
300 ft 60° When the motorcyclist is at A, his velocity is 1 ft/s and he increases his speed along the vertical circular path at the rate of j = 0.3t ft/s, where t is in seconds. If he starts 1 ft/s at A, determine the velocity and acceleration at B. On the figure, draw the velocity and acceleration at B. 300 ft
At moment of time t=0 a projectile is fired directly upward with an initial velocity 192 ft/sec, and initial height 200 ft. Find: a)velocity and acceleration after t seconds, (b) velocity when projectile hits the ground, (c) time of travel from the highest point to the ground. Equation of motion is h"= -32, where h(t) is the height of projectile at moment t.
show work 4. Suppose a stone is launched vertically upward with initial velocity 32 ft/sec from a height of 48 ft above ground. After t seconds its height is given by s(t) = -16t2 + 32t + 48 At the time when the stone hits the ground it is moving with a speed of A. 32 ft/s B. 24 ft/s C. 64 ft/s D. 48 ft/s E. 96 ft/s
A skater on a rink is travelling with a velocity 4.2M+0.72J m s i when she collides with a stationary skater of the same mass. After the collision, the first skater has a velocity 1.20i + 1.261 m s-1. Assume the rink is frictionless (a) What is the velocity of the second skater (initially stationary), after the collision? (b) What is the angle through which the fist skater's trajectory is turned (c) What is the coefficient of restitution between the...
If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, it height in feet after t second is given by y=95t–16t2. Find the average velocity for the time period begining when t=1 and lasting(i) 01 seconds: (ii) 001 seconds:(iii) 0001 seconds:Finally based on the above results, guess what the instantaneous velocity of the ball is when t=1.
3.when x =10 ft, the crate has a speed of 20 ft/s which is increasing at 6 ft/s^2. Determine the direction of the crate?s velocity and magnitude of crate?s acceleration at this instant.
1 (a) A car accelerates from rest to a speed of 10.9 m/s in 8.4 seconds. Find the magnitude of the average acceleration. (b) If I accelerate for 5.3 seconds in my car at 2.6 m/s2 when I have an initial velocity of 20.9 m/s, what final velocity do I have? (c) If I apply an acceleration in the opposite direction to my initial velocity for 7.4 seconds of -3.2 m/s2 when I have an initial velocity of +21.6 m/s,...
Please answer all 3. Thanks A particle has an initial speed of 27 m/s rightward from the origin at t-0. It decelerates at 6t m/s2 (t in seconds). Find the speed after it has traversed 10m of distance. At what time does this occur 1. 2. At t = 0 a particle has a speed of 8 m/s rightward and is located at s-10m. Knowing a 2v3 (v in m/s) find the location and velocity at 4 seconds. What is...
An object is dropped from a tower, 1024 ft above the ground. The object's height above ground i seconds after the fall is s(t) = 1024 - 1612. Determine the velocity and acceleration of the object the moment it reaches the ground. ft/s. The velocity of the object the moment it reaches the ground is (Simplify your answer.) The acceleration of the object the moment it reaches the ground is fus2 (Simplify your answer.)
3. An ice skater is spinning counterclockwise about a vertical axis when viewed from above. What is the direction of her angular-momentum vector? Explain.