solve the following questions ( handwritten solution only neatly and clean box final answer) thankyou!

reference: https://drive.google.com/drive/folders/11WPTthaXKbm0VRybP-Gyl74xV2ZZV45I

Q1: The velocity-time (vt) graph for an object moving along a straight path is shown. Find the average acceleration of the object during the time interval [5 pts.] (a) 0sto 5 s, [5 pts.] (b) 5sto 15s, [5 pts.] (c) 0s to 20 s. v (m/s) [10 pts.] Q2: A ball is thrown vertically upward with initial velocity vy, from a height of 50.0 m. If the time interval from the highest point until it strikes the ground is 8 s, what is v;? Q3: If a 1500 kg car is initially moving at 120 ki /h. [5 pts.] (a) What is the amount of work that should be done to stop it? [5 pts.] (b) What is the magnitude of the force that can stop it as it undergoes a displacement of 500 km? Q4: A 20 kg ball is released from rest from the top edge of a semicircle (point P). [5 pts.] (a) If the ball's speed at the lowest point (point Q) is v = 10 m/s, what is the radius, R of the semicircle? [5 pts.] (b) What is the work done by gravity on the ball when it moves from point P to point Q? Q [5 pts.] Q4: The motor of a 500 g toy train accelerates the train from rest to 0.800 m/s. What is the force exerted to the toy train by the motor if the power delivered to it is 10 W? [Hint: vy = llzL"]