After a day of testing race cars, you decide to take your own 1460.7 kg car onto the test track. While moving down the track at 10.7 m/s, you suddenly accelerate to 33.3 m/s in 12.4 s. What average net force have you applied to the car during that time? Answer in units of N.
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- A cart of mass 8.00 kg was moved by applying two constant forces. Force 1 is 28.0N at 42.0°, and Force 2 is 13.0 N at 110°. Initially, the cart has a velocity of (3.50 i +2.20 j) m/s. EERIN d. What is the acceleration of the cart? Ans. å = (2.05 i + 3.87 j) e. What is the cart's velocity after 5.00 s? or 4.38- Ans. 3 = (13.75 i + 21.55 j)" or 25.56 m m100. mmh The speed of a bobsled is increasing because it has an accel- eration of 2.4 m/s². At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 N. The combined mass of the bobsled and its riders is 270 kg. (a) What is the magnitude of the force propelling the bobsled forward? (b) What is the magnitude of the net force that acts on the bobsled?Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 2.7-kg projectile from rest to a speed of 8.3 x 10³ m/s. The net force accelerating the projectile is 4.9 x 105 N. How much time is required for the projectile to come up to speed? i 189.8 Units S
- A spacecraft was designed to assess the ability of an impact to deflect the path of an asteroid. The spacecraft was launched on a rocket. At launch, the rocket has a mass of 555,000 kg and generates a force of 7.6 x 106 N. A. If you were to neglect the effect of gravity, what would the intial acceleration of the rocket be? B. If the acceleration were to remain constant, how fast will the rocket be moving after two seconds? C. As the rocket burns fuel its mass decreases. If the thrust remains the same, how would your answer to part B change? Would the speed after two seconds be lower, the same or higher?ou are pushing your friend in his wheelchair. You are both taking his dog, Wrathbone, to the vet. Wrathbone is 5 kg and is sitting in your friend’s lap. You decide to increase the wheelchair’s acceleration to 7 ms2 in order to get up a steep ramp. If your friend has a mass of 46 kg and his wheelchair has a mass of 16 kg. What is the force you are applying?A 9.50 kg object has the given x and y acceleration components. a, = (0.9) + m 0.39- s2 (0.73). a, = (11.7) - (091). t What is the magnitude Fnet of the net force acting on the object at time t = 6.87 s? N Fnet What is the angle 0 of the net force at this same time? Give your answer as a number of degrees counter-clockwise from the +x-аxis.
- Question 5. A 21.3-g bullet is fired from a rifle. It takes 2.40 × 10-³ s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 730 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet. Ans: 6479 N IN Question 6. A planet has a mass of 707 is the 2000If the rocket sled starts with only onw rocket burning, what is the magnitute of its acceleration. Assume that the mass of the system is 2.50x10^3 kg, the thrust F=2.10x10^4N and the force of friction opposing the motion is known to be f=665N. a. What is the magnitude of its acceleration?A car uniformly accelerates from 00 to 25.0 m/s.25.0 m/s. A 70.0-kg70.0-kg passenger experiences a horizontal force of 5.00×102 N.5.00×102 N. How much time ?t does it take for the car to reach 25.0 m/s?
- A 2700 kg car traveling to the north is sloweddown uniformly from an initial velocity of 36.6m/s by a 6810 N braking force acting oppositethe car’s motion.a) What is the car’s velocity after 2.19 s?Answer in units of m/s. b) How far does the car move during the 2.19 ss?Answer in units of m. c) How long does it take the car to come to acomplete stop?Answer in units of s.Santa Clause is about to distribute his gifts, but his reindeer Rudolph is still sleepy. So, instead of flying they use the ground and cross a 20-m-long bridge. Starting from rest, Rudolph pulls Santa and his sleigh, with a force F 30° above the horizontal against a frictional force of 80N. 1. Draw an appropriate free body diagram to represent all the forces acting on Santa and his sleigh. 2. Suppose the combined mass of Santa, his sleigh, and his gifts is 500kg. What is the magnitude of Fif the acceleration of Santa and his sleigh is 1.5 meters per second squared? 3. How much work is done by Rudolph in pulling Santa and his sleigh in crossing the bridge? 4. What is the change in the kinetic energy of Santa and his sleigh after crossing the bridge? 5. How fast are they moving at the end of the bridge?A 7kg model rocket, initially at rest, accelerates upwards by generating a 135N thrust as it burns fuel for 5.3s. After running out of fuel the rocket continues upwards until reaching maximum height. Throughout the flight the rocket experiences a steady 23N drag force. Neglect the loss of mass as the rocket ejects fuel. What is the magnitude of the rocket's acceleration as What rocket's maximum speed during the flight? it burns fuel? unit unit What maximum height does the rocket reach? What is the magnitude of the rocket's acceleration unit after running out of fuel? unit