3. Jet engines on the 100 Mg VTOL aircraft exert a constant vertical force of 981 kN as it hovers. Determine the net impulse on the aircraft over t = 10 s. a. -981 KN.s b. 0 kN's c. 981 kN-s d. 9810 kN-s ↑ F = 981 KN

A cyclist intends to cycle up a 6.0 ⚫ hill whose vertical height is 120 m. The pedals turn in a circle of diameter 34.0 cm. If each complete revolution of the pedals moves the bike 4.90m along its path, calculate the average force that must be exerted on the pedals tangent to their circular path. Neglect work done by friction and other losses. Mass of the person riding and bicylce combined is 80 kg

Dynamics

QUESTION 4 A force of P-330 N is applied to the 75-kg cart. The mass center of the cart is at G. (a) Determine the reaction at both the wheels at A. (b) Determine the reaction at both the wheels at B. (c) What is the acceleration of the cart? 30° G. 0.4 m 0.3 m 0.3 m + - 0.2 m 0.08 m Ca NA-290, NB =151, a=7.25 Cb.NA =189, NB =251, a-4.57 CC.NA -338, NB =461, a=5.75 d.NA =160, NB =411, a-3.81 Click Save and Submit to save and submit. Click Save All Answers to save all answers. BOE 1,025 DEC 24 étv

Question 9 A car of mass 1200 kg is travelling west with a velocity of 72 kmh=1. It takes a left turn at 50° and continues with the same speed. It takes 5.5 s to turn the corner. a. Find the change in momentum of the car as it rounds the corner. b. Find the force the road applies to the cars tyres as it turns the corner. c. Find the force the car's tyres apply to the road as it turns the corner.

Ggg

In a railroad classification yard, a 69-Mg freight car moving at 1.5 m/s at A encounters a retarder section of track at B which exerts a retarding force of 36 kN on the car in the direction opposite to motion. Over what distance x should the retarder be activated in order to limit the speed of the car to 4.3 m/s at C? 168 m A 3.5 m B (Vertical scale exaggerated) Answer:x = i

6

Which of the following is the most ideally constructed momentum-impulse diagram for the system of golf ball and golf club?

7