7. A 60.0 kg astronaut is freely floating in space and pushes on a freely floating 120.0 kg spacecraft with a force of 30.0 N for 1.50 s. What is the velocity of the spacecraft?
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- a 10kg box accerlerates forward at a rate of 12 m/s. what is the force of the box?A rocket is descending to the surface of Mars where g = 4 m/s ^ 2 . The rocket is initially 80 m above the planet's surface and is descending downward at 50 m/s. The mass of the rocket is 2500 kg. The rocket will land on the surface with a final velocity of 0. Our goal is to find the upward thrust force on the rocket to make this happen. Draw a motion diagram . Find the deceleration of the rocket. Draw force diagram for the rocket. Show the net force. Find the thrust force on the rocket ?24. A pickup truck with mass 980 kg is initially at rest. The truck accelerates to a speed of 95 km/hr within a distance of 60 meters. What the direction and size of the force that acts on the truck? a. b. If the truck were carrying a load of 200 kg, what new force would be required to achieve the same acceleration?
- A stack of two crates is being accelerated upwards by two cables. The cables are directly attached to crate 1 and the tension in each cable is 3248 N. You may assume that the masses of the cables are negligible compared to the masses of the crates. The acceleration of the crates is? bottom crate crate 1 is 109 kg. the top crate is 248 kg.Tom travels to the moon for NASA. While on the moon, the total weight of Tom and his lunar exploration suit is 224 N. His suit has a mass of 50 kg. The acceleration due to gravity is 9.81 m/s2 on Earth and 1.67 m/s2 on the moon. What would his weight be on Earth without the heavy suit? 1. 490 N 2. 830 N 3. 987 N 4. 1304 NYou are in charge of a cannon that exerts a force 17100 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.37 m and the cannon is aimed at a 36.7 ◦ angle from the ground. The acceleration of gravity is 9.8 m/s 2 . If you want the ball to leave the cannon with speed v0 = 89 m/s, what mass cannon ball must you use? Answer in units of kg. Answer in units of kg.
- 7. A bowling ball and a feather are dropped from a height of 100 ft. The bowling ball weighs 12 Ibs and the feather weighs 3 ounces. a. What is the Force (in Newtons) of both objects? b. The value of g is varies depending on what planet you are on. Bigger planets have a larger value of g. The value of g on the moon is 1.62 m/s2. Calculate the forces of these objects falling on the moon.4. a. There is a forward force of 4962.5 N on the front train car from the engine. There is no friction. What is the acceleration of the train? m₁ = 1070 kg, m₂ = 450 kg, and m3 = 1356.25 kg. m3 Previous submissions: b. What is T₁? Previous submissions: c. What is T2? Previous submissions: m2 m₁