Physics 2425 Test 1 Question and
answers already passed 2025/2026
For general projectile motion the horizontal component of a projectile's acceleration - correct answer
✔is zero
A ball rolls off the edge of a table. The horizontal component of the ball's velocity remains constant
during its entire trajectory because - correct answer ✔the ball is not acted upon by a force in the
horizontal direction
The velocity of an object is given by v(t) = 2.00m/s + (3.00m/s)t - (1.0m/s^2)t^2. Determine the
instantaneous acceleration at time t = 5.00 s. - correct answer ✔-7.00 m/s^2 (take deriv then plug in t)
You are trying to cross a river that flows due south with a strong current. You start out in your
motorboat on the west bank desiring to reach the east bank directly east from your starting point. You
should head your motorboat..? - correct answer ✔in a northeasterly direction
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice,
the car can still negotiate the curve if the horizontal component of the normal force on the car from the
road is equal in magnitude to..? - correct answer ✔mv^2/r
If the position versus time graph of an object is a horizontal line, the object is..? - correct answer ✔at
rest
The base SI unit of mass is - correct answer ✔kilogram
Suppose a ball is thrown straight up, reaches maximum height, then falls to its initial height. Make a
statement about the direction of the velocity and acceleration as the ball is going up. - correct answer
✔its velocity points upward and its acceleration points downward.
answers already passed 2025/2026
For general projectile motion the horizontal component of a projectile's acceleration - correct answer
✔is zero
A ball rolls off the edge of a table. The horizontal component of the ball's velocity remains constant
during its entire trajectory because - correct answer ✔the ball is not acted upon by a force in the
horizontal direction
The velocity of an object is given by v(t) = 2.00m/s + (3.00m/s)t - (1.0m/s^2)t^2. Determine the
instantaneous acceleration at time t = 5.00 s. - correct answer ✔-7.00 m/s^2 (take deriv then plug in t)
You are trying to cross a river that flows due south with a strong current. You start out in your
motorboat on the west bank desiring to reach the east bank directly east from your starting point. You
should head your motorboat..? - correct answer ✔in a northeasterly direction
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice,
the car can still negotiate the curve if the horizontal component of the normal force on the car from the
road is equal in magnitude to..? - correct answer ✔mv^2/r
If the position versus time graph of an object is a horizontal line, the object is..? - correct answer ✔at
rest
The base SI unit of mass is - correct answer ✔kilogram
Suppose a ball is thrown straight up, reaches maximum height, then falls to its initial height. Make a
statement about the direction of the velocity and acceleration as the ball is going up. - correct answer
✔its velocity points upward and its acceleration points downward.
