A well-thrown ball is caught in a well-padded mitt. If the acceleration of the ball is 2.10 × 104 m/s2 , and 1.85 ms (1 ms = 10−3 s) elapses from the time the ball first touches the mitt until it stops, what is the initial velocity of the ball?

A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 6.65 ✕ 107 km. Radio waves travel at the speed of light (3.00 ✕ 108 m/s). How many seconds does it take for the signal to reach the Earth?

A muon (an elementary particle) enters a region with a speed of 5.45 x 106 m/s and then is slowed at the rate of 1.30 x 1014 m/s². (a) How far does the muon take to stop? m (b) Graph x versus t for the muon. x (m) 0.12 0.10 0.08 0.06 0.04 0.02 O 0.12 0.10 0.08 0.06 0.04 0.02 O x (m) Graph v versus t for the muon. v (m/s) 6x106 5x10 4x10 3x106 2x106 O 1x106 10 v (m/s) 6x10 5x10 4x106 3x106 2x106 1x106 10 Enter a number. Additional Materials 10 20 10 20 20 30 20 30 6x 10p 5x10 LL 4x106 3x10 2x10 1x106 t (ns) 30 40 30 40 40 t (ns) 40 t (ns) t (ns) O x (m) 0.12 0.10 0.08 0.06 0.04 0.02 O x (m) 0.12 0.10 0.08 0.06 0.04 0.02 v (m/s) v (m/s) 6x10 5x10 4x106 3x106 2x106 1x106 10 10 10 20 10 20 20 30 20 30 30 30 -t (ns) 40 40 40 40 t (ns) t (ns) t (ns)

The deck of a bridge is suspended 225 feet above a river. If a pebble falls off the side of the bridge, the height, in feet, of the pebble above the water surface after t seconds is given by  y = 225 − 16t2   a) Find the average velocity (in ft/s) of the pebble for the time period beginning when t = 3 and lasting the following amount of time.   0.1 seconds 0.05 seconds 0.01 seconds   b)  Estimate the instantaneous velocity (in ft/s) of the pebble after 3 seconds

Two locomotives 70 kilometers apart are travelling on the same track towards each other, Engine A moves at 22 kilometers per hour east and engine B moves at 13 kilometersper hour west. At the instant both trains begin moving, an annoying mutant fly beginsflying from engine A towards engine B at 33 kilometers per hour . The instant it touchesB, it turns around and flies back. It goes on this way until the two locomotives collideand the mutant fly is finally squashed. So, before its untimely demise, a) what is the total distance the fly flew? b) the time it took till  it was eliminated and c) the average velocity of the fly? how can i find this please

A graph of position versus time for a certain particle moving along the x-axis is shown in the figure below. Find the average velocity in the following time intervals. x (m) 10 8 1000049 2 M 1 2 3 4 5 6 7/8 (d) 4.00 s to 7.00 s m/s (e) 0 to 8.00 s m/s

The position versus time for a certain particle moving along the x axis is shown in the figure below. Find the average velocity in the following time intervals. х (m) 10 8 4 t (s) 1 2 3 4 5 6 7 8 -2 -4 -6 (a) 0 to 2 S m/s (b) 0 to 3 s m/s (c) 3 to 6 s m/s

Parts g, h, & i

A boxer's fist and glove have a mass of m = 1.04 kg. The boxer's fist can obtain a speed of v = 9.25 m/s in a time of t = 0.21 s. Write a symbolic expression for the magnitude of the average acceleration, aave, of the boxer's fist, in terms of the variables provided.  Find the magnitude of the average acceleration, aave, in meters per square second. Write an expression for the magnitude of the average net force, Fb, that the boxer must apply to his fist to achieve the given velocity. (Write the expression in terms of m, v and t.) What is the numerical value of Fb, in newtons?

A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 7.96 ✕ 107 km. Radio waves travel at the speed of light (3.00 ✕ 108 m/s). How many seconds does it take for the signal to reach the Earth?