RIO SOLADO - PHY 111 Midterm 1 Latest Update 2025-2026 200 Questions and 100% Verified Correct Answers Guaranteed A+
A 500 kg rollercoaster car starts from rest at the top of a 10.0 m tall hill. It then travels down the track and up a loop. The top of the loop is 7.0 m from the ground. What is the speed of the rollercoaster car at the top of the loop assuming negligible friction losses? -
CORRECT ANSWER: 7.7 m/s
A ball is attached to the center of the ceiling inside of a van moving at constant speed. If the ball is released, where will the ball land? - CORRECT ANSWER: Directly below its starting position (middle of the van)
A box moving on a horizontal surface with an initial velocity of 20 m/s slows to a stop over a time period of 5.0 seconds due solely to the effects of friction. What is the coefficient of kinetic friction between the box and the ground? - CORRECT ANSWER: 0.41
A car accelerates from rest at a rate of 20 m/s2. How far will the car have traveled by
the time it reaches a speed of 30 m/s? - CORRECT ANSWER: 22.5 m
A car moving at a constant 25 m/s travels for 3.0 seconds. What is the distance traveled
by the car? - CORRECT ANSWER: 75 m
A car travels at a constant speed up a hill from point A to point B as shown in the diagram below. Which of the following statements is most correct? - CORRECT
ANSWER: The gravitational energy increases, and the kinetic energy remains the
same.
A car travels forwards at a constant speed of 30 m/s for 5.0 seconds. How far will the car move in this time? - CORRECT ANSWER: 150 m 1 / 4
A jogger starts at a position of 4.0 m and moves forwards at a constant rate ending at a position of 12.0 m at a time 4.0 s later. What is the speed of the jogger? - CORRECT
ANSWER: 2.0 m/s
A large truck moving at 30 mph collides with a parked car. How does the force of the truck on the car compare to the force of the car on the truck? - CORRECT ANSWER: The force of the truck on the car is equal to the force of the car on the truck.
A medium-sized air conditioning unit is rated at 900 W. How much energy will the AC
unit require in order to operate for 2.0 hours? - CORRECT ANSWER: 6.48x106 J
A negative acceleration indicates that an object might be - CORRECT ANSWER:
moving forward while slowing down.
A student applies a 147 N force at an angle 30° below the horizontal to a 15.0 kg box at rest on the ground. The coefficient of static friction is 0.7, and the coefficient of kinetic
friction is 0.5. Describe the motion of the box. - CORRECT ANSWER: The box will
remain motionless.
A student applies a horizontal force of 100 N to a 25 kg box causing the block to accelerate at a rate of 1.5 m/s/s. Which of the following is the best approximation of the
magnitude of the friction force on the box? - CORRECT ANSWER: 63 N
A student applies a steady 100 N force at an angle 45° below the horizontal to a 25 kg box. The maximum static friction force on the box is 100 N. Which of the following is the Newton's third law reaction pair force to the 100 N force applied by the student? -
CORRECT ANSWER: The force of the box on the student
A student connects a 1 hp motor to a bicycle. How much time will it take for the bicycle to accelerate from rest to a speed of 5.0 m/s if the combined mass of the student and the bicycle is 120 kg? (1 hp = 746 W) - CORRECT ANSWER: 2 sec 2 / 4
A student connects a 300 kg container to a rope and pulley system and then connects the rope to a motor. If the student wants to lift the container 10.0 m in 2.0 min, what
average power rating is required? - CORRECT ANSWER: 245 W
A student fires a bullet horizontally from a gun. Which statement is most accurate? -
CORRECT ANSWER: The bullet will start to fall as soon as it leaves the gun.
A student fires a bullet horizontally out of a gun. At the same time the bullet leaves the gun, the student drops a second bullet from the same height. Which bullet hits the
ground first? - CORRECT ANSWER: The two bullets will hit the ground at the same
time.
A student gives a 5.0 kg box a brief push causing the box to move with an initial speed of 8.0 m/s along a rough surface. The box experiences a friction force of 30 N as it
slows to a stop. How long does it take the box to stop? - CORRECT ANSWER: 1.3 s
A student jumps out of a plane and activates her parachute a few seconds later. How does the force of the parachute on the student compare to the force of the student on
the parachute? - CORRECT ANSWER: The force of the parachute on the student is
equal to the force of the student on the parachute.
A student kicks a ball so that the ball's initial velocity is 12 m/s at 60°. What is the
maximum height of the ball? - CORRECT ANSWER: 5.5 m
A student kicks a ball so that the ball's initial velocity is 8.3 m/s at 30°. How much time
does the ball spend in the air? - CORRECT ANSWER: 0.9 s
A student launches a rocket with some initial velocity v at some angle θ. The rocket hits a wall on its way back down to the ground. (See the diagram below.) Which of the following statements is most accurate? - CORRECT ANSWER: The speed of the rocket just before it hits the wall is less than the starting speed of the rocket. 3 / 4
A student launches a small 0.5 kg rocket with an initial speed of 30 m/s at an angle of 60°. Approximately how much time will the rocket spend in the air? Air resistance is
negligible. - CORRECT ANSWER: 5.3 s
A student measures the mass of an object at 4.68 g and the volume of the object at 2.3 mL. The student calculates the density as 2.03478 g/mL. A second student disagrees with the density. Which of the following statements would explain why the second
student disagrees? - CORRECT ANSWER: The number of decimals in the answer does
not show proper precision.
A student measures the mass of an object at 4.68 g. Which of the following statements is most accurate? - CORRECT ANSWER: he first two digits are measured and the last digit is estimated.
A student models the constant speed motion of an object with the following equation:
x = (-2 m/s) t + (4 m)
Which of the following descriptions of motion is consistent with this equation? -
CORRECT ANSWER: The object starts at a positive position and travels backwards.
A student models the constant speed motion of an object with the following equation:
x = (4 m/s) t + (-15 m)
Which of the following descriptions of motion is consistent with this equation? -
CORRECT ANSWER: The object starts at a negative position and travels forwards.
A student moves 3.0 m south, 6.0 m east, and 1.0 m north. What is the angle of the
displacement? - CORRECT ANSWER: -18°
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