A small rocket of weight 1.7 lbs is launched vertically with thrust 3 lbs from a stand on the ground at time t=0 seconds. It has a constant thrust for the first second, then no thrust after that. We will assume no air friction and ignore the mass change of the rocket for now. Determine how long it will take until the rocket reaches maximum height. seconds
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- A packing crate with mass 80.0 kg is at rest on a horizontal, frictionless surface. At t = 0 a net horizontal force in the +x-direction is applied to the crate. The force has a constant value of 80.0 N for 12.0 s and then decreases linearly with time so it becomes zero after an additional 6.00 s. What is the final speed of the crate, 18.0 s after the force was first applied?3. What is the speed of the block of mass m1 5.0 kg and of the ball of mass m2 10 kg when it has fallen a distance h 1.0 m? The system starts from rest and neglect the friction between the block and the surface.A 23-g rifle bullet traveling 220 m/sm/s buries itself in a 3.0-kg pendulum hanging on a 2.0-m-long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's maximum displacement. Enter your answers numerically separated by a comma. Express your answers using two significant figures.
- 3 3 d d d ed ed ed ed (7%) Problem 8: A 4.75 105-kg rocket is accelerating straight up. Its engines produce 1.15 107 N of thrust, and air resistance is 4.4. 1061 Randomized Variables m=4.75.105-kg f=1.15 107 N fr=4.4.106 N. ▷ What is the rocket's acceleration, using a coordinate system where up is positive? a= 24.211 sin() cos() cotan() asin()) atan() acotan() cosh() tanh() O Degrees Submit tan() J ( acos() E sinh() cotanh() Radians Hint 7 4 * 1 Feedback 8 9 5 6 2 3 ^^^ 1 + 0 VO BACKSPACE DEL I give up! HOME END CLEARA 2.4 kg ball strikes a wall with a velocity of7.1 m/s to the left. The ball bounces off witha velocity of 5.9 m/s to the right.If the ball is in contact with the wall for0.23 s, what is the constant force exerted onthe ball by the wall?Answer in units of N.Sam, whose mass is 74.0 kg, takes off across level snow on his jet-powered skis. The skis have a thrust of 220.0 N and a coefficient of kinetic friction wtih the snow of 0.07. Unfortunately, the skis run out of fuel after only 11.5 seconds. What Sam's top speed (in m/s) assuming that the acceleration due to gravity is 9.80 m/s2? How far (in m) has Sam traveled when he finally coasts to a stop?
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- Sam, whose mass is 80 kgkg , takes off across level snow on his jet-powered skis. The skis have a thrust of 160 NN and a coefficient of kinetic friction on snow of 0.10.1. Unfortunately, the skis run out of fuel after only 15 ss . What is Sam's top speed? Express your answer to two significant figures and include the appropriate units. How far has Sam traveled when he finally coasts to a stop? Express your answer to two significant figures and include the appropriate units.Jason takes off from rest across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible). The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.10. Unfortunately, the skis run out of fuel after only 52 s. What is Jason's top speed?One student pulls a car with 20 N to the East. Another student pulls the car with 30 N to the West. The car accelerates at 2 m/s² when the two students work together. What is the mass of the car (in kg)?