The NEXT morning, you wake up in a strange room yet again, and this time you drop a ball from a height of 1.33 m above the floor. The ball hits the floor 0.365 s after your drop it. You guess that you must have been taken to an alien planet with gravity different from Earth s. What is this planet s g (that is, the magnitude of the acceleration due to gravity on this planet)?

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?

The next few questions challenge you to figure out the acceleration due to gravity ( g ) on various hypothetical alien planets. On Planet #1, you drop a stone from rest, 76.1 m above the ground, and the stone hits the ground 6.17 s later. What is the value of g on Planet #1?     24.67 m/s^2     4.00 m/s^2     2.00 m/s^2     12.33 m/s^2

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?

A spacecraft starts from rest, and makes a journey to a destination 389000 km from its starting point. It does so by accelerating at a constant rate of 9.79 m/s^2 up to the midpoint of the journey, and then decelerates at the same constant rate of 9.79 m/s^2 for the second half of the journey, ending at rest. How long did the entire journey take?     11 hr 2 min     5 hr 31 min     3 hr 30 min     2 hr 29 min

The earth moves around the sun in an orbit that is roughly circular with a radius of 1.5 x 10^11m once every year (1 year = 3.15 x 10^7s). What is the magnitude of the acceleration experienced by the Earth?

v(t) = 4t3 + 10t m/s. The initial position is r = 3 m. 3. A one dimensional problem. Assume v = Determine the position and acceleration at time t = 3sec.

On a distant planet, a ball is thrown downward from a height of 12 m.  The ball has an initial speed of 4.0 m/s.  If the ball hits the ground in 2.0 seconds, what is the planet's gravitational acceleration?

A car is moving at 18.00[m/s], and comes to a stop in 3.45[s], due to friction acting on the car. Assuming the acceleration is constant, what is the magnitude of the acceleration experienced by the car? Express your answer in m/s2.